{"rounds":[{"id":"round-1","label":"Easy Openers","n":123,"take":"https://take.quiz-maker.com/QQZVIERQJ","title":"Game Night Trivia Quiz"},{"id":"round-2","label":"Funny Round","n":99,"take":"https://take.quiz-maker.com/Q4UDG92YX","title":"Funny Trivia Quiz: Sounds Made Up But True"},{"id":"round-3","label":"Weird Round","n":97,"take":"https://take.quiz-maker.com/Q450UBZ34","title":"Weird Trivia Quiz: Facts That Doubt Reality"},{"id":"round-4","label":"Obscure and Hard","n":92,"take":"https://take.quiz-maker.com/QE4XLFN86","title":"Obscure Trivia Quiz: The Hardest Stumpers"},{"id":"round-5","label":"Bar Trivia","n":137,"take":"https://take.quiz-maker.com/QJZICQU0U","title":"Pub Quiz: Bar Trivia Rounds"},{"id":"round-6","label":"General Knowledge","n":124,"take":"https://take.quiz-maker.com/Q04OGDNVR","title":"General Knowledge Trivia Quiz"},{"id":"round-7","label":"The Final Round","n":114,"take":"https://take.quiz-maker.com/QEHOXIFSV","title":"Expert Trivia Quiz: The Final Round"}],"qs":[{"q":"Which author wrote the Harry Potter book series?","a":"J.K. Rowling","w":"Joanne Rowling published Harry Potter and the Philosopher's Stone in 1997 under the pen name J.K. Rowling, adding a fictitious middle initial because her publisher feared boys might not read a book by a woman. The series went on to sell over 600 million copies worldwide, making it the best-selling book series in history.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In the 1994 Disney animated film The Lion King, what is the name of the young lion prince?","a":"Simba","w":"Simba is the hero of The Lion King, a cub who flees his kingdom after his uncle Scar murders his father Mufasa and frames him for the crime. The name Simba means 'lion' in Swahili, fitting perfectly for a future king of the Pride Lands.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which character in the TV show Friends famously repeated the phrase 'We were on a break'?","a":"Ross Geller","w":"Ross uses this defense repeatedly throughout the series after sleeping with someone during a disputed break from his relationship with Rachel. The catchphrase became so iconic that the show revisited the argument across multiple seasons, turning it into one of the defining running jokes of the entire series.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What is the name of Bruce Wayne's loyal butler in the Batman franchise?","a":"Alfred Pennyworth","w":"Alfred has served the Wayne family for decades and is often described as the emotional backbone of Bruce Wayne's crime-fighting life. He provides everything from medical assistance to sharp-tongued wisdom, making him far more than a household servant.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In the Pixar Toy Story films, what kind of toy is the character Woody?","a":"A cowboy doll","w":"Woody is a pull-string cowboy doll and the leader of Andy's toys throughout the Toy Story series, which began in 1995 as the first feature-length film made entirely with computer animation.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What color is the DreamWorks animated character Shrek?","a":"Green","w":"Shrek is a large, green ogre who first appeared in the 2001 DreamWorks animated film of the same name. His swampy green skin became one of the most recognizable character designs in animation history, and the franchise went on to become one of DreamWorks' biggest properties.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In the Nintendo video game series, what is the name of the Italian plumber who is the main hero?","a":"Mario","w":"Mario debuted in the 1981 arcade game Donkey Kong and has since starred in over 200 video games. Originally called 'Jumpman,' the character was renamed Mario after Mario Segale, the landlord of Nintendo of America's warehouse. He remains the most recognizable video game character in the world.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What animated Disney elephant is famous for flying with his oversized ears?","a":"Dumbo","w":"Dumbo, the 1941 Disney film, tells the story of a baby elephant mocked for his enormous ears who discovers they allow him to fly. The film was released during World War II and became a major commercial success at a critical time for the studio. The ears-as-wings idea made Dumbo instantly iconic.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"How many keys does a standard concert piano have?","a":"88","w":"The 88-key layout became standard in the late 19th century, spanning about seven and a quarter octaves. Most composers stopped writing notes outside this range because the strings required to produce lower or higher pitches would be impractical, so piano builders settled on 88 as the sweet spot.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which British singer names her albums 19, 21, 25, and 30 after her age when she wrote them?","a":"Adele","w":"Adele titles each album after the age she was during its writing, beginning with 19 in 2008. Her album 21 became one of the best-selling albums of the 21st century, powered by 'Rolling in the Deep' and 'Someone Like You.'","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What sport is the annual Wimbledon tournament most famous for?","a":"Tennis","w":"The Wimbledon Championships, held in London each summer, is the oldest tennis tournament in the world, dating back to 1877. It is the only Grand Slam still played on grass courts, giving it a unique look and feel that sets it apart from the other major tournaments.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In the Marvel films, what is the name of the fictional African nation ruled by the superhero Black Panther?","a":"Wakanda","w":"Wakanda is a technologically advanced fictional country in the Marvel Cinematic Universe, home to the rare metal vibranium and ruled by T'Challa, the Black Panther.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which streaming service produced the hit show Stranger Things?","a":"Netflix","w":"Stranger Things premiered on Netflix in July 2016 and became one of the platform's biggest original hits, drawing comparisons to 1980s films like E.T. and Stand By Me. The show helped cement Netflix's reputation for prestige original programming and turned its cast of young actors into global stars.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"How many bones does an adult human body have?","a":"206","w":"Babies are born with around 270 to 300 bones, many of which fuse together as they grow. By adulthood, the total settles at 206. The smallest bone in the body is the stapes in the ear, about the size of a grain of rice, while the largest is the femur in the thigh.","c":"round-1","s":"Science & Nature"},{"q":"Which planet in our solar system is the largest?","a":"Jupiter","w":"Jupiter is so large that all the other planets in the solar system could fit inside it with room to spare. It is a gas giant with no solid surface, and its Great Red Spot, a storm that has been raging for hundreds of years, is itself larger than Earth.","c":"round-1","s":"Science & Nature"},{"q":"What does DNA stand for?","a":"Deoxyribonucleic acid","w":"DNA carries the genetic instructions for the growth, development, functioning, and reproduction of all known living organisms. The double helix structure was famously described by Watson and Crick in 1953, and every human cell contains about two meters of DNA tightly coiled inside it.","c":"round-1","s":"Science & Nature"},{"q":"Which planet in our solar system is closest to the Sun?","a":"Mercury","w":"Mercury orbits the Sun at an average distance of about 58 million kilometers and completes one orbit every 88 Earth days. Despite being the closest planet to the Sun, it is not the hottest, because it has virtually no atmosphere to trap heat. That title goes to Venus.","c":"round-1","s":"Science & Nature"},{"q":"What is the chemical symbol for gold?","a":"Au","w":"The symbol Au comes from the Latin word aurum, meaning gold. This is why the symbol does not match the English name. Gold has been prized for thousands of years and is element number 79 on the periodic table. Its resistance to tarnishing and chemical attack is what makes it so enduringly valuable.","c":"round-1","s":"Science & Nature"},{"q":"How many colors are traditionally listed in a rainbow, and what is the common acronym used to remember them?","a":"Seven colors, remembered as ROY G BIV","w":"Isaac Newton chose seven colors to describe the visible spectrum: red, orange, yellow, green, blue, indigo, and violet. The acronym ROY G BIV is one of the most memorable mnemonics in science education. In reality, a rainbow is a continuous spectrum, but seven makes for a satisfying list.","c":"round-1","s":"Science & Nature"},{"q":"Which natural substance is the hardest material found in nature, rating a 10 on the Mohs scale?","a":"Diamond","w":"Diamond is pure carbon in a crystal structure so tightly bonded that nothing else scratches it. The Mohs scale of mineral hardness, developed in 1812, ranks minerals from 1 (talc) to 10 (diamond). This extreme hardness makes diamonds useful not just in jewelry but in industrial cutting and drilling tools.","c":"round-1","s":"Science & Nature"},{"q":"Approximately how many minutes does it take for light from the Sun to reach Earth?","a":"About 8 minutes","w":"Light travels at about 300,000 kilometers per second, and the Sun is about 150 million kilometers from Earth on average, so the journey takes roughly 8 minutes and 20 seconds. This means that when you look at the Sun, you are actually seeing it as it was about 8 minutes ago.","c":"round-1","s":"Science & Nature"},{"q":"Which ocean is the largest on Earth?","a":"The Pacific Ocean","w":"The Pacific Ocean covers approximately 165 million square kilometers, more than all of Earth's landmasses combined. It stretches from the Arctic in the north to the Antarctic in the south and contains the Mariana Trench, the deepest point on Earth at nearly 11,000 meters below sea level.","c":"round-1","s":"Science & Nature"},{"q":"Which planet in our solar system is famous for its spectacular ring system?","a":"Saturn","w":"Saturn's rings are made primarily of chunks of ice and rocky debris, ranging in size from tiny grains to boulders several meters across. While Jupiter, Uranus, and Neptune also have rings, Saturn's are by far the most prominent and can be seen through even a modest backyard telescope.","c":"round-1","s":"Science & Nature"},{"q":"What is the world's largest coral reef system, located off the coast of Australia?","a":"The Great Barrier Reef","w":"Stretching about 2,300 kilometers along Queensland's northeastern coast, the Great Barrier Reef is large enough to be visible from space. It is home to thousands of species of fish, corals, and marine life, and was designated a UNESCO World Heritage Site in 1981.","c":"round-1","s":"Science & Nature"},{"q":"What gas do trees and plants absorb from the air during photosynthesis?","a":"Carbon dioxide","w":"During photosynthesis, plants use sunlight to convert carbon dioxide and water into glucose and oxygen. This process is the foundation of almost all life on Earth, producing the oxygen we breathe and the food that sustains most ecosystems. It is one of the first scientific processes taught in school for good reason.","c":"round-1","s":"Science & Nature"},{"q":"Which country has more natural lakes than any other country in the world?","a":"Canada","w":"Canada is home to roughly 60 percent of all the natural lakes on Earth, estimated at well over 800,000 lakes larger than 10 hectares. This staggering number is the result of glaciers that carved out the Canadian Shield over thousands of years and then melted, filling the depressions with water.","c":"round-1","s":"Science & Nature"},{"q":"Who was the first human being to walk on the Moon, in 1969?","a":"Neil Armstrong","w":"Neil Armstrong stepped onto the lunar surface on July 20, 1969, as commander of NASA's Apollo 11 mission and spoke the famous line 'That's one small step for a man, one giant leap for mankind.' Buzz Aldrin joined him shortly after, while Michael Collins orbited above in the command module.","c":"round-1","s":"History & Geography"},{"q":"In which year did the Berlin Wall fall, marking a major moment in the end of the Cold War?","a":"1989","w":"The Berlin Wall fell on November 9, 1989, after East Germany announced that citizens could cross the border freely. Crowds gathered and began physically dismantling the wall that had divided the city since 1961. Germany was officially reunified less than a year later, in October 1990.","c":"round-1","s":"History & Geography"},{"q":"What is the capital city of Australia?","a":"Canberra","w":"Many people guess Sydney or Melbourne, but Canberra was purpose-built as a compromise between those two rival cities. The site was selected in 1908, and the city was formally named Canberra in 1913. It was designed by American architects Walter Burley Griffin and Marion Mahony Griffin, who won an international design competition.","c":"round-1","s":"History & Geography"},{"q":"The Eiffel Tower was built for which major international event in Paris?","a":"The 1889 World's Fair (Exposition Universelle)","w":"Designed by Gustave Eiffel, the tower was built as the entrance arch for the 1889 World's Fair, which celebrated the 100th anniversary of the French Revolution. It was intended to be a temporary structure and was nearly demolished in 1909, but was saved because its antenna was useful for telegraph communications.","c":"round-1","s":"History & Geography"},{"q":"On which continent is the Amazon rainforest primarily located?","a":"South America","w":"The Amazon rainforest spans approximately 5.5 million square kilometers, mostly in Brazil, which contains about 60 percent of the total area. The forest produces so much oxygen and absorbs so much carbon dioxide that scientists often call it the 'lungs of the Earth,' though that phrase is a simplification of a more complex reality.","c":"round-1","s":"History & Geography"},{"q":"What is the tallest mountain in the world?","a":"Mount Everest","w":"Mount Everest stands 8,849 meters (29,032 feet) above sea level on the border between Nepal and Tibet, a height confirmed in a 2020 joint survey by Nepal and China. It was first summited on May 29, 1953, by Edmund Hillary of New Zealand and Tenzing Norgay, a Sherpa from Nepal.","c":"round-1","s":"History & Geography"},{"q":"In what year did the ocean liner RMS Titanic sink?","a":"1912","w":"The Titanic struck an iceberg and sank on the night of April 14 to 15, 1912, during its maiden voyage from Southampton to New York. More than 1,500 people lost their lives in the disaster, making it one of the deadliest peacetime maritime disasters in history.","c":"round-1","s":"History & Geography"},{"q":"What is the official language of Brazil?","a":"Portuguese","w":"Brazil is the only Portuguese-speaking country in South America, a legacy of colonization by Portugal beginning in 1500. It is also the largest Portuguese-speaking country in the world by both area and population, with over 200 million native speakers of Brazilian Portuguese.","c":"round-1","s":"History & Geography"},{"q":"How many stripes are on the flag of the United States?","a":"13","w":"The 13 stripes on the US flag represent the original 13 colonies that declared independence from Britain in 1776. The stripes alternate between red and white, with seven red stripes and six white ones. The number of stars, however, has changed over time as new states joined the union, reaching 50 in 1960 when Hawaii was admitted.","c":"round-1","s":"History & Geography"},{"q":"What is the longest river in the world?","a":"The Nile","w":"The Nile stretches approximately 6,650 kilometers through northeastern Africa, flowing northward from its source in Burundi through countries including Uganda, Sudan, and Egypt before emptying into the Mediterranean Sea. While the Amazon occasionally rivals it depending on how measurements are taken, the Nile is conventionally recognized as the longest.","c":"round-1","s":"History & Geography"},{"q":"Which ancient wonder of the world was built as a tomb for a pharaoh and still stands today?","a":"The Great Pyramid of Giza","w":"Built around 2560 BCE for Pharaoh Khufu, the Great Pyramid of Giza is the oldest and only surviving structure from the original Seven Wonders of the Ancient World. It stood as the tallest human-made structure on Earth for over 3,800 years, until the completion of England's Lincoln Cathedral in the 14th century.","c":"round-1","s":"History & Geography"},{"q":"What are the five colors of the Olympic rings?","a":"Blue, yellow, black, green, and red","w":"The five interlocking rings were designed by Pierre de Coubertin in 1913. Together with the white background of the flag, these six colors appeared in the national flags of every country that competed in the Olympics at the time the symbol was created, making it a true emblem of global participation.","c":"round-1","s":"History & Geography"},{"q":"Nine-banded armadillos always give birth to exactly how many identical babies at a time?","a":"Four (identical quadruplets every single time).","w":"A single fertilized egg splits into four genetically identical embryos, all sharing one placenta. The armadillo is the only vertebrate on Earth that does this every time it reproduces, making every litter a set of perfect clones.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"What is the collective noun for a group of pandas?","a":"An embarrassment.","w":"A gathering of giant pandas is officially called an embarrassment, which feels appropriate given how rarely they manage to reproduce. The term belongs to a long tradition of medieval 'terms of venery' invented for groups of animals that nobles hunted or kept.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"What body part does a male platypus use to inject venom?","a":"A spur on each hind ankle.","w":"The platypus is one of the very few venomous mammals alive today. Males have hollow spurs on their hind ankles connected to venom glands in their thighs. The pain from a sting is described as excruciating and can last for months, which is an astonishing feature for an animal that also lays eggs.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"A kiwi bird lays an egg that makes up roughly what percentage of its own body weight?","a":"About 20 percent, making it the largest egg relative to body size of any bird.","w":"One female kiwi weighing 1.7 kg has been recorded laying a 406-gram egg. For comparison, an ostrich egg is only about 2 percent of the mother's body weight. Scientists still debate exactly why the kiwi's egg never shrank along with the bird over evolutionary time.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"What animal's fingerprints are so similar to human fingerprints that they can be nearly impossible to tell apart under a microscope?","a":"The koala.","w":"Scientists at the University of Adelaide found that koala fingerprints share the same loopy whorls and fine ridge details as human ones, even though koalas and primates last shared a common ancestor about 70 million years ago. It is a rare example of convergent evolution producing almost identical results.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Which animal can revert from its adult form back to its juvenile stage when stressed, potentially repeating the cycle indefinitely?","a":"The immortal jellyfish (Turritopsis dohrnii).","w":"When sick, injured, or old, this tiny jellyfish can essentially rewind its own life cycle, reverting to a polyp and then maturing all over again. It is the only known complex animal capable of this, and it is roughly the biological equivalent of a butterfly turning itself back into a caterpillar.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Mantis shrimp have up to 16 types of color receptors in their eyes. How many do humans have?","a":"Just three.","w":"Despite this overwhelming visual hardware advantage, research shows mantis shrimp actually distinguish fewer colors than humans do. Their system appears to work more like a fast color barcode scanner than a painter's palette, prioritizing speed over subtle distinctions.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Sea otters wrap themselves in what plant while sleeping to avoid drifting away?","a":"Kelp.","w":"Rather than anchoring themselves with anchor chains or tiny otter anchors, sea otters drape themselves in kelp fronds to stay in place while sleeping on the water's surface. Mothers also wrap their pups in kelp so the babies do not float away while mom is diving for food.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Which animal can smell prey buried under 20 feet of snow and has a molar rotated 90 degrees sideways specifically for crunching through frozen carcasses?","a":"The wolverine.","w":"Wolverines have an upper molar set at a right angle to the rest of their teeth, allowing them to shear through frozen meat and bone in conditions that would defeat most other predators. Despite being about the size of a medium dog, wolverines routinely steal kills from wolves and bears.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"What is a group of hippos called?","a":"A bloat.","w":"A gathering of hippos is called a bloat, which is both accurate and unflattering. Hippos also produce a reddish oily secretion from their skin that people once mistook for blood sweating, earning them an even more alarming reputation than their collective noun already provides.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"What tiny animal, roughly the size of a grain of rice, is the only known creature to have survived being exposed to the vacuum of outer space?","a":"The tardigrade, also known as the water bear.","w":"In 2007, dehydrated tardigrades were sent into low Earth orbit and exposed directly to the vacuum of space and solar radiation. More than 68 percent survived and were successfully rehydrated back to life within 30 minutes. They can also endure being frozen near absolute zero and absorbing 500 times the X-ray dose that would kill a human.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Under the UK Salmon Act 1986, what activity is specifically a criminal offence?","a":"Handling a salmon in suspicious circumstances.","w":"Section 32 of the Salmon Act 1986 makes it illegal to receive, handle, or dispose of salmon that you have reason to believe was illegally obtained. The phrase 'suspicious circumstances' is genuinely written into the statute, and the law was later expanded to cover trout, eels, lampreys, and freshwater fish as well.","c":"round-2","s":"Strange Laws & Regulations"},{"q":"In Switzerland, what must you legally own at least two of, because owning only one is considered animal cruelty?","a":"Guinea pigs.","w":"Switzerland's 2008 Animal Protection Ordinance requires that anyone keeping guinea pigs must have at least two, because a single guinea pig is considered socially deprived and legally mistreated. A rental service even exists for people who lose one guinea pig from their pair and need a temporary companion while they find a permanent one.","c":"round-2","s":"Strange Laws & Regulations"},{"q":"In Scotland, what specific activity is illegal under the Licensing Act 1872 if you are drunk?","a":"Being in charge of a cow (or horse, carriage, or steam engine).","w":"The Licensing Act 1872 covers more than pub hours. Being found drunk while in charge of a cow, horse, carriage, or loaded firearm is a criminal offence punishable by up to 51 weeks in jail. In 2009, a Norfolk man was actually charged under this act, while in charge of a mobility scooter.","c":"round-2","s":"Strange Laws & Regulations"},{"q":"In the United States, the traditional Scottish dish haggis has been largely banned from import since 1971. What ingredient makes it illegal under US food law?","a":"Sheep lung.","w":"US federal regulations prohibit the use of livestock lung in food products, partly because stomach fluids can contaminate lungs during slaughter. Traditional haggis contains sheep lung as up to 15 percent of its recipe, so authentic Scottish haggis has been kept off American shelves for over 50 years. Scotland has been lobbying for a reversal since at least 2014.","c":"round-2","s":"Strange Laws & Regulations"},{"q":"In Turin, Italy, what are pet owners legally required to do at least once a day, with fines of up to 500 euros for non-compliance?","a":"Walk their dog.","w":"Turin's municipal ordinance requires dog owners to walk their pets at least once daily. The law is part of Italy's broader animal welfare framework and is actually enforced. Failing to walk your dog is not just bad pet ownership in Turin. It is a fineable offence.","c":"round-2","s":"Strange Laws & Regulations"},{"q":"Wisconsin law specifically exempts one food product from being classified as a 'toxic substance' under employee safety regulations. What food is it?","a":"Lutefisk.","w":"Lutefisk is dried fish rehydrated in lye solution, creating a gelatinous dish with a smell intense enough to concern workplace safety regulators. Wisconsin's employees' right-to-know law specifically names lutefisk as exempt from toxic substance classification, suggesting the legislature had a sense of humor about the state's Scandinavian heritage.","c":"round-2","s":"Strange Laws & Regulations"},{"q":"In Indiana, what specific beverage are liquor stores legally prohibited from selling if it is refrigerated?","a":"Soda or water.","w":"Indiana law requires stores with a liquor license to sell alcohol but prohibits them from selling refrigerated non-alcoholic drinks like soda and water. A warm Coke is technically legal to sell alongside cold beer. The regulation was intended to keep liquor stores from competing with grocery stores, but produced a wonderfully absurd result.","c":"round-2","s":"Strange Laws & Regulations"},{"q":"A man named Charles Osborne began hiccupping in 1922 and did not stop until 1990. How long did his hiccups last?","a":"68 years.","w":"Osborne holds the Guinness World Record for the longest attack of hiccups. He hiccupped roughly 40 times a minute for most of that time, accumulating an estimated 430 million hiccups in total. He finally stopped in 1990 and died the following year, presumably at peace.","c":"round-2","s":"Human Body Oddities"},{"q":"Your nose is technically visible to you at all times. Why do you not see it?","a":"Your brain actively suppresses awareness of it because it is a stable, unchanging object that carries no new information.","w":"Your nose blocks part of both eyes' visual fields constantly, but neurons stop firing for stimuli that never change. The instant you focus on your nose, or close one eye, it pops back into view. Your brain is not blind to it; it is simply filtering it out as irrelevant, the same way you stop hearing a fan that has been running for hours.","c":"round-2","s":"Human Body Oddities"},{"q":"Try it right now: what happens when you try to hum while pinching your nose shut?","a":"You cannot sustain it. The hum dies within a second or two.","w":"Humming needs a continuous flow of air out through the nose. Pinch it shut and pressure equalises almost immediately, so the sound stops even though your vocal cords keep vibrating.","c":"round-2","s":"Human Body Oddities"},{"q":"What is the hardest substance your body produces, harder even than bone?","a":"Tooth enamel.","w":"Tooth enamel is 96 percent densely packed minerals, making it harder than any bone in your body. On the Mohs hardness scale it scores about 5, roughly equivalent to steel. Despite this remarkable hardness, enamel is also brittle and, critically, your body cannot regrow it once it is gone.","c":"round-2","s":"Human Body Oddities"},{"q":"Goosebumps serve no useful purpose in modern humans. What was their original function in our hairier ancestors?","a":"Making hair stand on end to trap warm air and make the body look larger and more threatening to predators.","w":"The tiny arrector pili muscles that cause goosebumps are still fully functional in humans; we just lost most of the body hair those muscles were meant to raise. The reflex is still triggered by cold or fear via the same adrenaline pathway, but since we are not very hairy, the result is just a pattern of small bumps that impresses no one.","c":"round-2","s":"Human Body Oddities"},{"q":"What is the only organ in the human body that only humans possess? No other mammal has a well-developed version of it.","a":"The uvula, the little dangly thing at the back of your throat.","w":"Every other mammal has only a rudimentary or absent uvula. In humans it helps close off the nasal passage during swallowing, triggers the gag reflex, and assists in producing certain speech sounds. It is also the world's most recognizable cartoon body part and the subject of more 'what even is that' questions than almost any other piece of anatomy.","c":"round-2","s":"Human Body Oddities"},{"q":"About 18 to 35 percent of people sneeze when they look at a bright light or step out into the sun. What is the actual medical name for this reflex?","a":"ACHOO syndrome, short for Autosomal-dominant Compelling Helio-Ophthalmic Outburst.","w":"Scientists chose to force the acronym ACHOO into existence, and it is a genuine inherited reflex. Aristotle noticed people sneezing at the sun in 350 BCE, and Francis Bacon disproved his explanation in the 17th century by staring at the sun with his eyes closed. The exact nerve-wiring cause is still debated. The acronym, however, is settled.","c":"round-2","s":"Human Body Oddities"},{"q":"Why do your fingernails grow slightly faster on your dominant hand?","a":"Increased blood flow and minor trauma from regular use stimulate faster nail growth on the hand you use more.","w":"Studies confirm that nail growth on the dominant hand is measurably, if subtly, faster. The more active hand gets more circulation, and small repeated impacts from daily tasks send repair signals that accelerate growth. The effect is real enough to track but small enough that you would only notice it over weeks of careful measurement.","c":"round-2","s":"Human Body Oddities"},{"q":"What is the main ingredient in belly button lint, and why does it almost always skew blue-gray regardless of what you wore that day?","a":"Stray clothing fibers, mostly from underwear, collected by abdominal hair. The color averages out across all garments worn.","w":"Body hair on the abdomen grows toward the navel and acts like a conveyor belt, transporting clothing fibers inward all day. The lint's blue-gray color reflects the statistical average of all the fabric colors your clothes contain. Men with more abdominal hair collect more lint, and shaving the hair stops lint production entirely.","c":"round-2","s":"Human Body Oddities"},{"q":"An axolotl can regrow which of the following: a lost leg, part of its heart, or part of its brain?","a":"All three.","w":"Axolotls regenerate limbs, heart tissue, spinal cord and parts of the brain without scarring, via dedifferentiation: adult cells revert to a stem-cell-like state. Humans carry similar genes but not the on-switch.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"The narwhal's iconic spiral tusk, which can reach up to 3 meters long, is actually what?","a":"A tooth, specifically a canine tooth that grows through the upper lip.","w":"Narwhals have only two teeth, both in the upper jaw. In males, the left one erupts through the lip and keeps growing throughout their life, while the right one stays embedded. The tusk contains up to 10 million nerve endings, allowing the narwhal to detect changes in water salinity. Some males grow two tusks when both teeth erupt.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"In 1932, Australia deployed soldiers armed with machine guns to fight an enemy that ultimately defeated them. What was the enemy?","a":"Emus.","w":"About 20,000 emus invaded Western Australian wheat farms after drought conditions pushed them toward settled land. Major Meredith and two soldiers with two Lewis guns fired thousands of rounds but found that emus absorbed bullets with alarming resilience and scattered into small groups that were impossible to herd. The campaign was officially recalled as a failure.","c":"round-2","s":"Historical Absurdities"},{"q":"How many rounds of ammunition did the Australian military fire during the Great Emu War of 1932, and approximately how many emus did they kill?","a":"About 9,860 rounds, killing fewer than 1,000 emus from a population of 20,000.","w":"Major Meredith reported 986 confirmed kills, roughly one emu per ten bullets fired. A member of parliament suggested the emus should be given medals for their military performance. The farmers who requested the operation were left largely unprotected, and the emus continued destroying crops.","c":"round-2","s":"Historical Absurdities"},{"q":"In 1325, the Italian city-states of Modena and Bologna went to war over a border dispute. Modena carried home what unusual trophy from the fighting that Bologna has been trying to get back ever since?","a":"A wooden bucket stolen from a well outside Bologna's city gate.","w":"After routing the Bolognese army at the Battle of Zappolino, Modenese soldiers took the bucket as a war trophy. The bucket still exists today, held in the base of Modena's Torre della Ghirlandina bell tower. A 17th-century poet wrote a mock-heroic epic about the whole affair, cementing its status as history's most embarrassing loss.","c":"round-2","s":"Historical Absurdities"},{"q":"A war between Greece and Bulgaria in 1925 was directly triggered by a Greek soldier who accidentally crossed the border while chasing what?","a":"His stray dog.","w":"On October 18, 1925, a Greek soldier ran after his dog across the Bulgarian border at the Demir Kapia pass. A Bulgarian sentry shot the soldier dead. Greece then issued an ultimatum, invaded Bulgaria, and occupied the town of Petrich. The League of Nations stepped in and ordered Greece to pay 45,000 pounds in compensation. The dog's fate is unrecorded.","c":"round-2","s":"Historical Absurdities"},{"q":"The Defenestration of Prague in 1618, which helped trigger the Thirty Years War, involved Catholic royal officials being thrown out of a window. Why did all three survive the 70-foot fall?","a":"They landed in a large pile of manure.","w":"Catholic sources at the time claimed the men were saved by angels. Protestant sources noted they had landed in a dung heap. The word 'defenestration' was coined in English specifically to describe this incident and means the act of throwing someone out of a window. Prague later had a second defenestration in 1419, suggesting windows were a recurring political tool in the city.","c":"round-2","s":"Historical Absurdities"},{"q":"In 1518 in Strasbourg, one woman began dancing uncontrollably in the street and within a month had been joined by roughly how many people, some of whom may have danced until they collapsed or died?","a":"Around 400 people.","w":"The Dancing Plague of 1518 is documented in physician notes, city council records, and cathedral sermons. The city authorities, believing the dancers needed to work through it, actually hired musicians to keep them going and rented a stage. Theories about the cause range from mass psychogenic illness to ergot fungus poisoning, but no explanation has been conclusively proven.","c":"round-2","s":"Historical Absurdities"},{"q":"Britain declared war on Spain in 1739 partly because of a pickled object that a sea captain carried to the British Parliament and dramatically produced as evidence of Spanish brutality. What was it?","a":"His own severed ear, which Spanish coast guards had cut off eight years earlier.","w":"Captain Robert Jenkins claimed Spanish officers boarded his ship in 1731, tied him to a mast by his neck, and sliced off his ear. He reportedly kept it preserved and showed it to Parliament in 1738. The resulting public outrage helped launch the War of Jenkins' Ear, a conflict that modern historians acknowledge was really about trade disputes, but the ear was more memorable.","c":"round-2","s":"Historical Absurdities"},{"q":"The Great Stink of 1858 in London was so severe that Parliament hung its curtains in what chemical to make it bearable to stay in the building?","a":"Chloride of lime.","w":"The summer of 1858 brought record heat and a drought that dropped the Thames to reveal decades of raw sewage baking on the riverbanks. MPs believed the smell was literally going to poison them. Parliament passed an emergency sewage overhaul bill in just 18 days, legislation that had been stalled for years, because the smell finally made the problem impossible to ignore.","c":"round-2","s":"Historical Absurdities"},{"q":"In 1859, Britain and the United States nearly went to war over a border dispute. The immediate trigger for the standoff involving hundreds of troops and warships was what specific event?","a":"An American farmer shot a pig owned by the Hudson's Bay Company.","w":"American settler Lyman Cutlar found a British-owned pig rooting in his garden and shot it. When British authorities threatened to arrest him, US troops were deployed. At peak tension there were over 400 US soldiers facing five British warships on San Juan Island. Both sides were ordered not to fire first. The standoff lasted 12 years, resulting in zero human casualties. The only casualty was the pig.","c":"round-2","s":"Historical Absurdities"},{"q":"The town of Lajitas, Texas held elections in the 1980s and 1990s in which the winner of multiple terms was a beer-drinking animal. What was it?","a":"A goat named Clay Henry.","w":"Clay Henry was a Billy goat famous for drinking Shiner Bock straight from the bottle. The residents of the tiny unincorporated community elected him mayor as a promotional stunt in 1986, and he served multiple terms. His successors, all named Clay Henry, have continued the tradition, each inheriting the same pen, name, and occasional beer.","c":"round-2","s":"Historical Absurdities"},{"q":"The American Thanksgiving turkey shares its name with the country Turkey. In the Turkish language, what do Turks call the bird, and which country does that name point to?","a":"In Turkish the bird is called 'hindi,' meaning 'from India.' In French it was 'coq d'Inde,' in Portuguese it is named after Peru.","w":"When the bird arrived in Europe from the Americas, nobody agreed on where it was from. English speakers blamed the Ottoman Empire and called it a turkey. Turks blamed India. The French blamed India too, shortening 'coq d'Inde' to 'dinde.' Portuguese speakers named it after Peru. The only country that correctly identified the bird as American was, apparently, nobody.","c":"round-2","s":"Historical Absurdities"},{"q":"What is the name of the fungus that infects carpenter ants, hijacks their muscles, and forces them to climb vegetation before killing them at an optimal spore-dispersal height?","a":"Ophiocordyceps unilateralis (zombie-ant fungus)","w":"The fungus does not infect the ant's brain; instead it infiltrates and directly controls the muscle fibers. When the ant reaches the correct height and orientation, the fungus causes the mandibles to lock onto a leaf vein and then produces a fruiting body that erupts from the ant's head to rain spores on ants below.","c":"round-3","s":"Bizarre Biology"},{"q":"Which organism holds the record for surviving the longest without water, able to lose up to 99 percent of its body water and then revive when rehydrated after decades?","a":"Tardigrade (water bear)","w":"In a state called cryptobiosis, tardigrades replace their body water with a sugar called trehalose, which forms a glass-like matrix protecting their cells. Specimens have been revived from moss samples kept dry for more than 30 years, and they can also survive vacuum, radiation doses that would kill most other animals, and temperatures near absolute zero.","c":"round-3","s":"Bizarre Biology"},{"q":"What deep-sea creature has a transparent head filled with a fluid-filled chamber that allows it to look straight up through its skull with tubular eyes?","a":"Barreleye fish (Macropinna microstoma)","w":"For decades, researchers thought the barreleye's eyes faced forward because the transparent dome was destroyed by collection nets. Live observation via ROV revealed the dome is intact in the wild and the luminous green tubular eyes are completely enclosed inside the fluid-filled transparent shield, rotating upward to spot prey silhouetted against faint surface light.","c":"round-3","s":"Bizarre Biology"},{"q":"What plant produces the world's largest unbranched inflorescence, a spike that can reach 6 meters tall, generates heat to spread its smell of rotting flesh, and blooms only once before dying?","a":"Titan arum (Amorphophallus titanum)","w":"The titan arum's central spike, called a spadix, can reach temperatures of up to 36 degrees Celsius through a process called thermogenesis, which volatilizes the odor compounds and mimics the warmth of carrion to attract the beetles and flies that pollinate it. Each plant spends years storing energy in an underground corm before expending everything on a single bloom that lasts roughly 24 to 48 hours.","c":"round-3","s":"Bizarre Biology"},{"q":"Which single-celled organism navigates mazes and solves network-optimization problems despite having no brain or nervous system?","a":"Physarum polycephalum (slime mold)","w":"Researchers placed the slime mold in mazes with oat flakes at exit points and found it explored all routes simultaneously through pseudopod networks, then eliminated dead ends to leave only the shortest efficient path. In a famous 2010 study it recreated a network almost identical to the Tokyo rail system, prompting engineers to use it as a design-optimization model.","c":"round-3","s":"Bizarre Biology"},{"q":"What is the only known animal that can biologically reverse its aging process and revert from a sexually mature adult back to its juvenile polyp stage?","a":"Turritopsis dohrnii (immortal jellyfish)","w":"When stressed by injury, illness, or old age, Turritopsis dohrnii initiates a process called transdifferentiation, converting its mature cells back into undifferentiated ones and rebuilding itself as a polyp. The cycle can theoretically repeat indefinitely, making it the only known animal capable of biological immortality under the right conditions.","c":"round-3","s":"Bizarre Biology"},{"q":"What plant is capable of moving its leaves to fold inward within seconds of being touched, a response driven entirely by changes in water pressure with no muscles involved?","a":"Mimosa pudica (sensitive plant)","w":"Specialized cells at the base of each leaflet and leaf stem, called pulvini, rapidly lose water through ion-channel-driven osmosis when disturbed. The resulting turgor pressure drop causes the leaves to collapse inward in under a second. The response propagates electrically along the stem, and the plant reopens within minutes once the threat has passed.","c":"round-3","s":"Bizarre Biology"},{"q":"Which melanin-rich fungus was found thriving on the walls inside the damaged Chernobyl reactor, and appears to grow toward radiation sources?","a":"Cladosporium sphaerospermum","w":"The fungus is packed with melanin and colonised some of the most radioactive surfaces in the ruined reactor. Researchers have proposed that melanin lets it harness ionising radiation, though the mechanism is still debated.","c":"round-3","s":"Bizarre Biology"},{"q":"What North American plant captures and digests insects not with leaves but with a hollow, water-filled tube that acts as a pitfall trap, and also hosts a unique community of organisms that live only inside it?","a":"Purple pitcher plant (Sarracenia purpurea)","w":"The pitcher's tube is lined with waxy downward-pointing hairs that funnel insects into rainwater pooled at the base, where they drown and are digested by enzymes and bacteria. Remarkably, the plant hosts an exclusive micro-ecosystem inside each pitcher, including specialized mosquito larvae, mites, and bacteria found nowhere else on Earth.","c":"round-3","s":"Bizarre Biology"},{"q":"What deep-sea worm, discovered at hydrothermal vents, lives inside a tube with no mouth, no gut, and no anus, getting all its nutrition from bacteria living inside its own body tissue?","a":"Riftia pachyptila (giant tube worm)","w":"Riftia can reach over 2 meters in length yet has completely lost its digestive tract during evolution. Its body contains a specialized organ called a trophosome, which is packed with billions of chemosynthetic bacteria. The worm absorbs hydrogen sulfide from vent water through its red plume and supplies it to the bacteria, which produce the organic compounds the worm lives on.","c":"round-3","s":"Bizarre Biology"},{"q":"Which plant produces seeds that have been successfully germinated after lying dormant for over 2,000 years, discovered among archaeological artifacts?","a":"Judean date palm (Phoenix dactylifera)","w":"In 2005, botanist Elaine Solowey germinated seeds recovered from the ancient Masada fortress in Israel, dated to between 155 BCE and 64 CE. The resulting tree, nicknamed Methuselah, grew to over 3 meters and produced pollen, proving viability after roughly 2,000 years of dormancy. Carbon dating confirmed the seeds' ancient origin.","c":"round-3","s":"Bizarre Biology"},{"q":"What bioluminescent deep-sea organism uses a dangling light lure that is actually a modified fin spine colonized by symbiotic bacteria that produce the glow?","a":"Anglerfish (suborder Ceratioidei)","w":"The anglerfish's esca, the glowing lure at the tip of its illicium rod, produces light through bacteria of the genus Aliivibrio. The fish cannot produce bioluminescence on its own; it acquires the bacteria from the seawater and they colonize the esca. In several species the bacteria are thought to be obligate symbionts, unable to survive outside the lure.","c":"round-3","s":"Bizarre Biology"},{"q":"What type of lake, found across the Siberian and Alaskan Arctic, forms when permafrost thaws and collapses into a water-filled depression, and actively releases methane as it grows?","a":"Thermokarst lake","w":"When ice-rich permafrost thaws, the ground above it collapses and fills with meltwater, creating a thermokarst lake. The lake then absorbs more solar heat than surrounding tundra and drives further thaw in a self-amplifying cycle. As the decomposing organic material beneath the lake releases methane, some thermokarst lakes bubble so vigorously that their surfaces are flammable in winter.","c":"round-3","s":"Strange Places"},{"q":"What natural lake in the African Rift Valley is so alkaline it acts like liquid cement, calcifying the bodies of animals that die in it, and its shores host one of the world's densest flamingo populations?","a":"Lake Natron, Tanzania","w":"Lake Natron's pH can reach 10.5 and its water is saturated with natron, a sodium carbonate mineral. Animals that die in or near the lake are rapidly encrusted in mineral deposits. Counterintuitively, the same caustic chemistry that calcifies corpses also makes the lake the primary breeding ground for nearly 75 percent of the world's lesser flamingos, which nest on its toxic shores safe from predators.","c":"round-3","s":"Strange Places"},{"q":"What cave in New Zealand is famous for a ceiling covered in thousands of glowing lights that are actually the silk snares of bioluminescent larvae waiting to catch flying insects?","a":"Waitomo Glowworm Caves, New Zealand","w":"The 'glowworms' are larvae of the fungus gnat Arachnocampa luminosa, found only in New Zealand. Each larva hangs dozens of mucus threads from the cave ceiling and produces a blue-green bioluminescent glow from its tail to attract midges and other insects. The entire ceiling appears star-like, giving the caves the appearance of a night sky underground.","c":"round-3","s":"Strange Places"},{"q":"What Bolivian salt flat is so reflective during the rainy season that satellites have used it to calibrate their altimeters, and it is the world's largest natural mirror?","a":"Salar de Uyuni, Bolivia","w":"When a thin layer of water from seasonal rains covers Salar de Uyuni's vast salt crust, the surface becomes the flattest and most reflective natural terrain on Earth. The reflectivity and extreme flatness have made it useful for remote-sensing satellite calibration. The flat extends over 10,582 square kilometers and lies at an elevation of roughly 3,656 meters in the Andes.","c":"round-3","s":"Strange Places"},{"q":"What remote island in the Indian Ocean hosts trees that look like inside-out umbrellas, found nowhere else on Earth, and was called the Galapagos of the Indian Ocean by researchers?","a":"Socotra Island, Yemen","w":"Socotra's most iconic tree, the dragon blood tree (Dracaena cinnabari), has an inverted umbrella shape that collects moisture from sea mist on its thick canopy and channels it to its roots. Due to millions of years of isolation, more than a third of Socotra's plant life is endemic. UNESCO designated it a World Heritage Site for its extraordinary biodiversity.","c":"round-3","s":"Strange Places"},{"q":"What underground lake in southern Romania, discovered in 1986, has been sealed off from the surface for an estimated 5.5 million years and contains species found nowhere else on Earth?","a":"Movile Cave, Romania","w":"Movile Cave was sealed beneath a limestone cap for over 5 million years. Its air is toxic to humans, low in oxygen and rich in hydrogen sulfide, yet it hosts a thriving ecosystem of 48 species previously unknown to science. These organisms rely entirely on chemosynthetic bacteria as a food base, with no sunlight input whatsoever, making it one of Earth's only truly isolated cave biospheres.","c":"round-3","s":"Strange Places"},{"q":"What geological feature in Ethiopia is the only place on Earth where a volcanic caldera meets a tectonic plate boundary, allowing visitors to walk on land that is actively splitting apart?","a":"Dallol, Ethiopia (Danakil Depression)","w":"Dallol sits in the Afar Triangle where three tectonic plates are pulling apart, and hydrothermal venting creates vivid yellow and green acid pools with pH values near zero, among the most acidic natural habitats on Earth. The area sits roughly 125 meters below sea level, making it one of the lowest and hottest year-round inhabited places, with average temperatures above 34 degrees Celsius.","c":"round-3","s":"Strange Places"},{"q":"What lake in Palau is populated by millions of golden jellyfish that follow the sun across the lake each day, and swimmers can safely drift through them because the jellyfish have lost their stinging ability through evolution?","a":"Jellyfish Lake (Ongeim'l Tketau), Palau","w":"Jellyfish Lake became isolated from the ocean thousands of years ago and its golden jellyfish population, Mastigias papua etpisoni, evolved in the absence of their main predators. Without selection pressure to use their nematocysts defensively, the stingers became vestigial. Millions of jellyfish migrate daily in a circuit that tracks sunlight, navigating by their symbiotic algae's need for photosynthesis.","c":"round-3","s":"Strange Places"},{"q":"What is the name of the region over the South Atlantic and South America where Earth's magnetic field is unusually weak, exposing passing satellites to extra radiation?","a":"The South Atlantic Anomaly","w":"The inner Van Allen radiation belt dips closest to Earth here, so satellites crossing it absorb far more charged particles. Many spacecraft, including the Hubble telescope, switch off sensitive instruments while passing through.","c":"round-3","s":"Strange Places"},{"q":"What natural fire in Australia has been burning continuously underground for an estimated 6,000 years, fueled by a coal seam, and a town was built around it without residents initially realizing the ground beneath them was on fire?","a":"Burning Mountain (Wingen), New South Wales, Australia","w":"Burning Mountain is the oldest known naturally burning coal seam fire on Earth. The subsurface fire moves southward at about 1 meter per year, and its surface expression is a slowly migrating vent emitting smoke and heat. The site was considered a volcano by early European settlers. At its current pace, the coal seam could sustain combustion for thousands more years.","c":"round-3","s":"Strange Places"},{"q":"What sea off the coast of Norway is known for a vast whirlpool system that was once thought to be a hole leading to the underworld and inspired Edgar Allan Poe's story 'A Descent into the Maelstrom'?","a":"Moskstraumen (the Maelstrom), Norway","w":"The Moskstraumen forms where tidal currents between the Lofoten Islands create one of the world's strongest open-water tidal whirlpool systems, with surface speeds exceeding 3 meters per second. Ancient Norse sagas described it as a bottomless abyss that could swallow ships. It is real and genuinely dangerous, though not the bottomless vortex of legend.","c":"round-3","s":"Strange Places"},{"q":"If you drop a feather and a bowling ball in a perfect vacuum, which hits the ground first?","a":"They hit at the same time","w":"Galileo proposed this in the 16th century and it was dramatized famously on the Moon in 1971 when Apollo 15 astronaut David Scott dropped a hammer and a feather simultaneously. In a vacuum, gravity accelerates all objects equally regardless of mass. Air resistance is what makes a feather fall slower on Earth, not any difference in how gravity acts on it.","c":"round-3","s":"Counterintuitive Science"},{"q":"What property of water means that a ship made of steel floats while a steel ball sinks, even though both are the same material?","a":"Average density relative to water (buoyancy)","w":"Whether an object floats depends not on its material density but on whether its average overall density, including any trapped air, is less than water. A steel ship's hull encloses a large volume of air, making its average density less than 1 gram per cubic centimeter. A solid steel ball has a density of roughly 7.8 grams per cubic centimeter, so it sinks. Archimedes described this principle around 250 BCE.","c":"round-3","s":"Counterintuitive Science"},{"q":"At what temperature do Celsius and Fahrenheit read exactly the same number?","a":"Minus 40 degrees","w":"The Fahrenheit scale was defined so that water freezes at 32 and boils at 212. The Celsius scale sets those points at 0 and 100. The two scales converge at exactly negative 40 degrees because of the arithmetic of their relative slopes. This is the only temperature at which the two readings are identical, and it is also cold enough to cause frostbite in under a minute.","c":"round-3","s":"Counterintuitive Science"},{"q":"Why does a hot air balloon rise even though the balloon fabric and basket are heavier than air?","a":"The heated air inside is less dense than the surrounding air, making the total average density of the balloon system lower than the air it displaces","w":"Heating the air inside the balloon causes it to expand, and since the balloon is open at the bottom, excess air spills out, leaving the interior air less dense than the surrounding atmosphere. The buoyant force on the balloon equals the weight of the air it displaces, and once that exceeds the total weight of the system, the balloon ascends. It is the same principle as a bubble rising in water.","c":"round-3","s":"Counterintuitive Science"},{"q":"What happens to the boiling point of water if you increase the atmospheric pressure above it, such as inside a pressure cooker?","a":"The boiling point rises above 100 degrees Celsius","w":"Water boils when its vapor pressure equals the atmospheric pressure pushing down on its surface. Increase that external pressure and water must be heated to a higher temperature before it can boil. A standard pressure cooker at about 15 PSI above atmospheric pressure raises the boiling point to roughly 121 degrees Celsius, which is why food cooks faster and why autoclaves sterilize at that temperature.","c":"round-3","s":"Counterintuitive Science"},{"q":"Why does glass appear transparent while the same atoms that form silicon dioxide in quartz sand are opaque and gray?","a":"The amorphous (non-crystalline) atomic structure of glass allows photons to pass through without being absorbed or strongly scattered","w":"In crystalline quartz sand, grain boundaries, impurities, and the exact crystalline structure scatter light in all directions, making it opaque. When silica is melted and cooled rapidly into glass, its atoms are arranged randomly without a repeating lattice. This amorphous structure lacks the grain boundaries that scatter light, and the energy gap in glass does not match visible photon energies, so visible light passes straight through.","c":"round-3","s":"Counterintuitive Science"},{"q":"What counterintuitive thing happens to a compressed spring's total mass compared to an uncompressed spring of the same material?","a":"The compressed spring has slightly more mass","w":"Einstein's mass-energy equivalence (E = mc squared) means that stored elastic potential energy adds a tiny, measurable mass to the spring. The amount is absurdly small, on the order of femtograms for a typical spring, but it is a real physical effect. The same principle means a charged battery is very slightly heavier than a dead one, and a hot object is very slightly heavier than a cold one.","c":"round-3","s":"Counterintuitive Science"},{"q":"Why does liquid water at 4 degrees Celsius sink to the bottom of a lake in winter rather than floating to the top as you might expect of cold water?","a":"Water is densest at 4 degrees Celsius, not at freezing point","w":"Unlike most substances, water reaches its maximum density at 4 degrees Celsius, not at its freezing point of 0 degrees. As water cools below 4 degrees it actually becomes less dense and rises, which is why ice forms on the surface. This anomaly is caused by hydrogen bonding forcing water molecules into a less compact hexagonal lattice as they approach freezing, and it allows aquatic life to survive winter under a protective ice layer.","c":"round-3","s":"Counterintuitive Science"},{"q":"A bullet fired horizontally from a gun and a bullet dropped simultaneously from the same height will hit the ground at exactly the same time. Why?","a":"Gravity acts equally on both bullets regardless of their horizontal velocity","w":"This is the independence of perpendicular motion: horizontal velocity has no effect on vertical acceleration. Both bullets experience exactly the same downward gravitational acceleration of 9.8 meters per second squared. The fired bullet travels far horizontally while falling, but it falls at the same rate as the dropped bullet. This is directly demonstrated in labs worldwide with simultaneous drop-and-shoot apparatus.","c":"round-3","s":"Counterintuitive Science"},{"q":"What phenomenon causes a non-Newtonian fluid like cornstarch and water to behave as a liquid when touched gently but as a rigid solid when struck hard?","a":"Shear thickening (dilatancy)","w":"In a shear-thickening fluid, the viscosity increases with applied stress. At low shear rates the cornstarch particles are loosely packed and can flow past one another, but at high impact the particles jam together into a momentarily rigid network. This property is being studied for use in body armor: a liquid-soaked fabric that flows freely until it takes an impact, at which point it stiffens to absorb the blow.","c":"round-3","s":"Counterintuitive Science"},{"q":"If you could somehow stand on the surface of a neutron star and drop an object from waist height, how long would it take to hit the surface?","a":"Roughly one microsecond (about 0.000001 seconds)","w":"A neutron star's surface gravity is roughly 200 billion times that of Earth, meaning anything dropped falls with an acceleration of about 2 trillion meters per second squared. An object dropped from 1 meter would reach the surface in approximately one microsecond, hitting at a significant fraction of the speed of light. The impact energy would be enormous enough to trigger a nuclear reaction on the star's crust.","c":"round-3","s":"Counterintuitive Science"},{"q":"What ultralight synthetic solid is so thermally insulating that a block of it can sit on a soap bubble without popping it while the far end of the block rests in a blowtorch flame?","a":"Aerogel","w":"Aerogel is made by replacing the liquid in a silica gel with air, producing a solid that is 99.98 percent empty space by volume. Its thermal conductivity of roughly 15 milliwatts per meter-kelvin is lower than that of still air itself. The result is an insulator so extreme that a thin slab can hold a person's weight while a flame touches the other side without burning through for an extended period.","c":"round-3","s":"Counterintuitive Science"},{"q":"How long did it take the light you see when you look at the Andromeda Galaxy to reach your eyes?","a":"About 2.537 million years","w":"Andromeda is approximately 2.537 million light-years from Earth, meaning the photons hitting your retinas left their source before the genus Homo existed. You are seeing Andromeda as it was during the Pliocene epoch. At the same time, observers in Andromeda looking toward us would be seeing the Milky Way as it was roughly 2.5 million years ago, a galaxy our ancestors never knew.","c":"round-3","s":"Cosmic & Physics Oddities"},{"q":"What is the approximate percentage of the observable universe that is made up of the ordinary matter, such as atoms, that forms every star, planet, person, and gas cloud we can detect?","a":"About 5 percent","w":"The remaining 95 percent of the universe's energy content is divided between dark energy (roughly 68 percent), which drives the accelerating expansion of the universe, and dark matter (roughly 27 percent), which interacts gravitationally but emits no light. Both dark energy and dark matter are inferred only from their gravitational effects; neither has been directly detected in a lab.","c":"round-3","s":"Cosmic & Physics Oddities"},{"q":"UY Scuti, one of the largest stars ever measured, has a radius roughly 1,700 times the Sun's. Placed at the Sun's position, past which planet's orbit would its surface reach?","a":"Jupiter","w":"A star that size would swallow Mercury, Venus, Earth and Mars entirely and extend beyond Jupiter's orbit. Its exact radius is uncertain because such stars have diffuse, pulsating outer layers.","c":"round-3","s":"Cosmic & Physics Oddities"},{"q":"What happens to time on the surface of a massive object like a neutron star compared to time far away from it, according to general relativity?","a":"Time runs slower on the surface (gravitational time dilation)","w":"General relativity predicts that the stronger a gravitational field, the slower time passes. On a neutron star's surface, where gravity is 200 billion times stronger than Earth's, time runs measurably slower relative to a distant observer. This is not a theory artifact but a confirmed physical reality: GPS satellites must correct for the fact that their clocks run slightly faster in weaker gravity than clocks on Earth's surface.","c":"round-3","s":"Cosmic & Physics Oddities"},{"q":"What fundamental particle passes through your body at a rate of roughly 100 trillion per second, yet almost never interacts with any matter in you?","a":"Neutrinos","w":"Neutrinos are produced in vast numbers by nuclear reactions in the Sun. They interact with matter only through the weak nuclear force, making their cross-section for interaction so small that a neutrino could pass through a light-year of solid lead and have only a 50 percent chance of hitting anything. Detectors designed to catch them require thousands of tonnes of ultra-pure water or ice buried deep underground to shield against interference.","c":"round-3","s":"Cosmic & Physics Oddities"},{"q":"How close to the speed of light would a spaceship have to travel for its crew to age only one year while 10 years passed on Earth?","a":"About 99.5 percent of the speed of light","w":"At 99.5 percent of c, the Lorentz factor is approximately 10, meaning the crew would experience time at one-tenth the rate of Earth observers. At 99.9999 percent of c the factor reaches about 707, allowing a crew to cross the Milky Way in roughly 100 years of ship time while over 100,000 years pass on Earth. This time dilation has been confirmed with atomic clocks on aircraft and in GPS satellites.","c":"round-3","s":"Cosmic & Physics Oddities"},{"q":"What was the temperature of the universe approximately one second after the Big Bang?","a":"About 10 billion degrees Celsius","w":"One second after the Big Bang the universe was so hot that it was dominated by a plasma of quarks, gluons, electrons, positrons, and neutrinos all in thermal equilibrium with radiation. At around 3 minutes, the temperature had fallen to roughly 1 billion degrees, allowing protons and neutrons to fuse into helium nuclei in a process called Big Bang nucleosynthesis that set the universe's elemental composition.","c":"round-3","s":"Cosmic & Physics Oddities"},{"q":"What phenomenon causes two black holes spiraling toward each other to emit gravitational waves powerful enough to be detected on Earth as a change in distance smaller than one-thousandth the diameter of a proton?","a":"The inspiral and merger of binary black holes","w":"LIGO detected the first confirmed gravitational waves in September 2015 from two black holes merging roughly 1.3 billion light-years away. The signal stretched and compressed the 4-kilometer LIGO arms by about 10 to the power of negative 18 meters, far smaller than a proton's diameter. In the final fraction of a second before merger, the two black holes released more power than all the stars in the observable universe combined.","c":"round-3","s":"Cosmic & Physics Oddities"},{"q":"What is the name of the theoretical minimum temperature at which all molecular motion stops, and how far below the coldest natural temperature in the universe is it?","a":"Absolute zero (-273.15 degrees Celsius), which is about 2.7 degrees below the coldest natural background temperature in the universe","w":"The cosmic microwave background radiation permeates the universe at about 2.725 Kelvin, making that the coldest natural temperature found in space. Absolute zero, 0 Kelvin, is 2.725 degrees below that. No region of the observable universe is naturally colder than the CMB. Physicists have cooled samples in labs to within billionths of a degree of absolute zero, but have never reached it exactly.","c":"round-3","s":"Cosmic & Physics Oddities"},{"q":"Which Byzantine emperor issued the first known quarantine law in history, ordering travelers from plague-affected regions to wait 40 days before entering the empire?","a":"Justinian I","w":"Emperor Justinian I responded to the Plague of Justinian (541-549 AD) with isolation measures that predated the Venetian 'quarantino' by nearly 800 years. The 40-day waiting period he imposed on arrivals from Egypt and the Levant is among the earliest documented state-mandated disease containment policies in the Western world.","c":"round-4","s":"Deep-Cut History"},{"q":"What was the name of the Venetian noblewoman who in 1678 became the first woman to receive a university doctorate in Europe, awarded by the University of Padua?","a":"Elena Cornaro Piscopia","w":"Elena Cornaro Piscopia earned a doctorate in philosophy from the University of Padua on June 25, 1678, making her the first woman in the world to receive a university degree. The Church refused to let her receive a theology degree as originally planned, so philosophy was substituted. A marble statue of her stands in the university to this day.","c":"round-4","s":"Deep-Cut History"},{"q":"The first European to reach the Pacific Ocean by crossing the Americas on foot was not Hernan Cortes or Francisco Pizarro. Who was it, in 1513?","a":"Vasco Nunez de Balboa","w":"Vasco Nunez de Balboa led an expedition across the Isthmus of Panama and on September 25, 1513, climbed a peak in Darien and became the first European to see the Pacific from the Americas. He waded into the water in full armor and claimed the ocean and all lands touching it for the Spanish Crown.","c":"round-4","s":"Deep-Cut History"},{"q":"The Treaty of Perpetual Peace signed in 1502 between England and Scotland was called 'perpetual' but lasted only 11 years. What event shattered it?","a":"The Battle of Flodden (1513)","w":"The Treaty of Perpetual Peace, sealed by the marriage of James IV of Scotland to Margaret Tudor, was supposed to end centuries of Anglo-Scottish conflict forever. It collapsed when James IV invaded England to support France in 1513 and was killed at Flodden Field, the last reigning British monarch to die in battle.","c":"round-4","s":"Deep-Cut History"},{"q":"Ancient sources hostile to which Roman emperor claimed he planned to make his horse Incitatus a consul?","a":"Caligula","w":"Suetonius and Cassius Dio wrote decades later and both had reason to blacken his name. Modern historians read the story as a joke about the uselessness of the Senate, or as invented slander.","c":"round-4","s":"Deep-Cut History"},{"q":"In 1932, the United States Post Office briefly allowed parents to mail their young children. One child, Maud Smith, was reportedly mailed 73 miles for how much postage?","a":"53 cents","w":"After parcel post service began in 1913, at least two sets of parents in rural America mailed their toddlers to relatives via the US postal service, insured as parcels. Maud Smith was mailed in 1914 from Glendale to her grandmother's home in Lewiston, Idaho, for 53 cents in postage. The Postmaster General quickly issued a clarification banning the practice.","c":"round-4","s":"Deep-Cut History"},{"q":"The first woman to run for US President did so 48 years before women had the right to vote. Who was she, and in what year?","a":"Victoria Woodhull in 1872","w":"Victoria Woodhull, a stockbroker and newspaper publisher, ran for President in 1872 on the Equal Rights Party ticket, with Frederick Douglass as her running mate (without his consent). She was jailed on election day on obscenity charges and received no verified Electoral College votes, but her campaign was a landmark in American political history.","c":"round-4","s":"Deep-Cut History"},{"q":"The Three Hundred and Thirty Five Years War between the Netherlands and the Isles of Scilly began in 1651 and ended with a peace treaty in which year?","a":"1986","w":"No shot was ever fired and no one was hurt. The Dutch ambassador travelled to Scilly in 1986 to sign a formal peace, joking that islanders had lived in terror of an attack that never came.","c":"round-4","s":"Deep-Cut History"},{"q":"What was the 'Kettle War' of 1784, and why did it get its name?","a":"A naval skirmish between the Holy Roman Empire and the Dutch Republic in which the only thing hit was a soup kettle on a Dutch ship","w":"The Kettle War was a brief confrontation on the Scheldt River in October 1784 when Holy Roman Emperor Joseph II challenged Dutch control of the river. Austrian forces fired on Dutch ships; the only recorded casualty was a soup kettle struck by cannonball. The Dutch paid a small indemnity and the matter was closed, making it one of history's least violent armed confrontations.","c":"round-4","s":"Deep-Cut History"},{"q":"Who was Hedy Lamarr's co-inventor on a 1942 US patent for a 'secret communications system' using frequency hopping, a concept that later underpinned Bluetooth and Wi-Fi?","a":"George Antheil","w":"Hollywood actress Hedy Lamarr and avant-garde composer George Antheil patented a radio guidance system in 1942 that used synchronized, rapidly changing frequencies to prevent torpedo signals from being jammed. The patent expired before the technology was widely adopted, meaning they never profited from it. The underlying concept is a direct ancestor of spread-spectrum technology used in modern wireless communications.","c":"round-4","s":"Deep-Cut History"},{"q":"The Westinghouse Time Capsule buried at the 1939 New York World's Fair is intended to be opened in what year?","a":"6939","w":"Westinghouse sealed a torpedo-shaped capsule containing seeds, newsreels and a Sears catalogue 15 metres underground, set for retrieval 5,000 years later. A second capsule was added at the 1964 fair.","c":"round-4","s":"Deep-Cut History"},{"q":"The Stroop effect, where naming the ink color of a color-word written in a different color takes longer than reading the word itself, was described in a 1935 paper by John Ridley Stroop. What was the title of that paper?","a":"Studies of interference in serial verbal reactions","w":"John Ridley Stroop's 1935 doctoral dissertation at George Peabody College, published in the Journal of Experimental Psychology, became one of the most-cited papers in psychology. What is less known is that Stroop himself largely moved on to theology and scripture after this finding, publishing almost nothing further in experimental psychology.","c":"round-4","s":"Niche Science"},{"q":"The Coriolis effect, which deflects winds and ocean currents across the rotating Earth, is named after Gaspard-Gustave de Coriolis. Which everyday mechanics concept, now taught in every physics class, did Coriolis also define in its modern scientific sense?","a":"The concept of 'work' (force times distance)","w":"Coriolis was a French mathematician and engineer who studied rotating machinery such as waterwheels. In his 1829 textbook he gave the term 'work' its modern technical meaning of force times distance, years before his 1835 paper described the deflecting force that now bears his name.","c":"round-4","s":"Niche Science"},{"q":"The Dunning-Kruger effect is named after psychologists David Dunning and Justin Kruger. What was the unusual real-world crime that inspired their original 1999 experiment?","a":"A bank robber who robbed banks in broad daylight without a mask because he believed lemon juice would make his face invisible to cameras","w":"Dunning and Kruger were inspired by the case of McArthur Wheeler, who in 1995 robbed two Pittsburgh banks without a disguise, confident that rubbing lemon juice on his face would render him invisible to security cameras. The juice, he believed, would work like invisible ink. When shown his clear image on the security footage, Wheeler was baffled.","c":"round-4","s":"Niche Science"},{"q":"The astronomical unit of parallax called the 'parsec' is defined as the distance at which 1 astronomical unit subtends an angle of 1 arcsecond. Who coined the word 'parsec' and in what year?","a":"Herbert Hall Turner in 1913","w":"British astronomer Herbert Hall Turner proposed the term 'parsec' in a letter to the Observatory journal in 1913 as a compact alternative to writing 'the distance corresponding to a parallax of one second.' It blends 'parallax' and 'arcsecond.' Turner is largely forgotten today despite naming the unit astronomers use most for interstellar distances.","c":"round-4","s":"Niche Science"},{"q":"The Purkinje effect is the tendency for the human eye to shift peak sensitivity toward the blue end of the spectrum in dim light. What did Jan Evangelista Purkinje first demonstrate this through?","a":"Comparing the relative brightness of red and blue flowers at dusk","w":"In 1819, Bohemian physiologist Jan Evangelista Purkinje noticed that as evening fell, blue and violet flowers appeared brighter relative to red ones, while in daylight the red flowers seemed more vivid. This shift between photopic (cone-dominated) and scotopic (rod-dominated) vision now bears his name and explains why red colors appear to darken first at twilight.","c":"round-4","s":"Niche Science"},{"q":"What is the official SI unit of catalytic activity, and after whom or what is it named?","a":"The katal, named after the word 'catalysis' (from Greek 'katalysis')","w":"The katal (symbol: kat) was adopted as the SI unit of catalytic activity in 1999. It is defined as the catalytic activity that raises the rate of a reaction by one mole per second. Unlike most SI units, it is named not after a person but after the abstract concept of catalysis itself, making it one of the few SI units with a conceptual rather than biographical etymology.","c":"round-4","s":"Niche Science"},{"q":"The Voyager 1 spacecraft carries a golden record. Who designed the cover diagram that encodes instructions on how to play the record?","a":"Frank Drake and Carl Sagan (with pulsar map designed by Frank Drake)","w":"The binary-coded cover of the Voyager Golden Record was designed primarily by Frank Drake, the astronomer behind the Drake Equation, working with Carl Sagan's team. Drake devised the pulsar map that encodes the Sun's position relative to 14 pulsars, a solution to explaining our location to extraterrestrials without assuming any shared coordinate system.","c":"round-4","s":"Niche Science"},{"q":"Thorium-229, a radioactive isotope, is unique in having a nuclear isomer with the lowest known transition energy of any atomic nucleus. Why does this make it potentially valuable for technology?","a":"Its nuclear transition falls in the ultraviolet range, making it theoretically usable as an atomic clock far more precise than any existing cesium clock","w":"Most nuclear transitions release gamma rays with energies in the megaelectronvolt range, impossible to probe with lasers. Thorium-229m's transition energy is only about 8.4 eV, in the vacuum ultraviolet range where lasers can reach it. A nuclear clock based on this transition could be up to 1,000 times more stable than current cesium atomic clocks and more resistant to external electromagnetic disturbances.","c":"round-4","s":"Niche Science"},{"q":"The mathematical term 'eigenvalue' is a German-English hybrid. What does the German word 'eigen' actually mean?","a":"Own, or characteristic","w":"David Hilbert coined Eigenwert in his early 1900s work on integral equations. English adopted the German prefix untranslated, which is why we say eigenvalue rather than characteristic value.","c":"round-4","s":"Niche Science"},{"q":"The first artificial satellite to successfully return data on the Van Allen radiation belts was Explorer 1 in 1958. Who built the Geiger counter instrument that made the discovery?","a":"James Van Allen and his team at the University of Iowa","w":"James Van Allen himself designed and built the Geiger-Mueller tube instrument aboard Explorer 1 that detected the belts that now bear his name. When initial readings showed the counter saturating rather than registering expected counts, Van Allen correctly deduced the instrument was overwhelmed by radiation intensity, not malfunctioning, a counterintuitive interpretation that confirmed the belts' existence.","c":"round-4","s":"Niche Science"},{"q":"The Bergmann's rule in zoology states that within a broadly distributed genus, species in colder climates tend to be larger-bodied. What is the complementary Allen's rule, and who was Allen?","a":"Allen's rule states that animals in colder climates have shorter, more compact limbs and appendages; Joel Asaph Allen was a 19th-century American zoologist","w":"Joel Asaph Allen formulated his rule in 1877, noting that the protruding body parts of endotherms (ears, limbs, tails, bills) tend to be shorter in colder environments to reduce heat loss through surface area. Allen was a curator at the American Museum of Natural History and also described over 1,000 bird and mammal species, yet today he is almost entirely eclipsed by Bergmann in textbooks.","c":"round-4","s":"Niche Science"},{"q":"The Schmidt number in fluid mechanics is the ratio of momentum diffusivity to mass diffusivity. Who was Ernst Heinrich Wilhelm Schmidt, and why is his name on this dimensionless number?","a":"Ernst Schmidt was a German engineer who pioneered boundary layer theory applied to heat and mass transfer in the early 20th century","w":"Ernst Heinrich Wilhelm Schmidt (1892-1975) was a German mechanical engineer and thermodynamicist at the Technical University of Munich. He developed foundational methods for analyzing simultaneous heat and mass transfer in fluid flows, particularly in evaporation and combustion. The Schmidt number, analogous to the Prandtl number but for mass transfer instead of heat transfer, encapsulates his contribution to transport phenomena.","c":"round-4","s":"Niche Science"},{"q":"The word 'salary' is often said to derive from 'salt' because Roman soldiers were 'paid in salt.' This is mostly a myth. What is the actual etymological link between 'salary' and 'salt'?","a":"Roman soldiers received a 'salarium,' an allowance to buy salt, not actual salt as payment","w":"The Latin 'salarium' referred to a sum of money allocated to soldiers for the purchase of salt, which was a costly and essential commodity. Soldiers were not paid in salt itself. The English word 'salary' derives from this allowance, so the salt connection is real but the popular version of the story, that soldiers literally carried home bags of salt as wages, is an embellishment.","c":"round-4","s":"Cultural Oddities"},{"q":"The practice of 'rough music,' where villagers would gather outside the home of someone who violated community norms (such as a wife-beater or adulterer) and make loud, discordant noise with pots and pans, was called 'charivari' in France. What was it called in England?","a":"Skimmington (or skimmington ride)","w":"The English version of the charivari, called a skimmington or rough music, involved a procession of neighbors banging pots and sometimes parading an effigy or a stand-in for the offending person. The skimmington specifically mocked men who were beaten by their wives or who failed to control their households, as defined by the community. It was widely practiced from the medieval period through the 18th century.","c":"round-4","s":"Cultural Oddities"},{"q":"The teddy bear was named after US President Theodore Roosevelt following a 1902 hunting trip. The specific incident inspiring the toy involved Roosevelt refusing to do what?","a":"Refusing to shoot a bear that had been tied to a tree for him to kill","w":"On a hunting trip in Mississippi in November 1902, Roosevelt's aides cornered, clubbed, and tied an American black bear to a willow tree for him to shoot, since he had not found any game. Roosevelt refused, considering it unsportsmanlike. A political cartoon by Clifford Berryman depicted the scene, which inspired a Brooklyn toy maker named Morris Michtom to create stuffed bears he called 'Teddy's bears.'","c":"round-4","s":"Cultural Oddities"},{"q":"In Japan, there is a formal concept called 'kuuki wo yomu,' meaning 'reading the air,' which describes the unspoken social pressure to conform to a group's unstated mood. What three-letter abbreviation do younger Japanese people use when someone spectacularly fails to read the air?","a":"KY (from 'kuuki yomenai,' meaning 'cannot read the air')","w":"The Japanese abbreviation KY, from 'kuuki yomenai,' describes someone who is tone-deaf to the social atmosphere of a room. The term emerged prominently in Japanese pop culture in the 2000s and has spawned a small genre of etiquette advice. It reflects the deep cultural weight Japan places on nonverbal, contextual social sensitivity as a marker of competence and consideration.","c":"round-4","s":"Cultural Oddities"},{"q":"The world's oldest known written recipe is for beer. Approximately how old is it, and on what medium was it preserved?","a":"About 3,900 years old, preserved on a Sumerian clay tablet (the Hymn to Ninkasi)","w":"The Hymn to Ninkasi, dated to approximately 1800 BCE and discovered inscribed on a Sumerian clay tablet, contains a detailed recipe for brewing beer as a praise song to Ninkasi, the Sumerian goddess of brewing. The hymn describes the entire process from making bappir (bread used as a fermenting agent) to filtering the finished beer. It is the oldest surviving written recipe of any kind.","c":"round-4","s":"Cultural Oddities"},{"q":"The origin of the three-ball symbol outside pawnshops is traced to which Italian banking family?","a":"The Medici family of Florence","w":"The three golden balls symbol associated with pawnbroking is traditionally attributed to the Medici family, whose coat of arms featured three or more balls (originally bezants, representing coins). As Medici banking spread across Europe, the symbol became associated with money lending and eventually with pawnbroking. Some historians link it alternatively to Saint Nicholas, who reputedly tossed bags of gold through a window to provide dowries for three poor sisters.","c":"round-4","s":"Cultural Oddities"},{"q":"The country of Bhutan measures national success using 'Gross National Happiness' instead of GDP. Which Bhutanese king invented the term, and in what decade?","a":"King Jigme Singye Wangchuck, in the 1970s","w":"Jigme Singye Wangchuck, who became Bhutan's fourth king at age 16 in 1972, coined the phrase 'Gross National Happiness' reportedly in a 1979 interview, arguing that Bhutan's development should be measured by the well-being of its people rather than economic output alone. The concept was later formalized into four pillars and nine domains and has been cited by economists and governments globally as an alternative development framework.","c":"round-4","s":"Cultural Oddities"},{"q":"What is 'turducken,' and which US state claims to have invented it?","a":"A deboned chicken stuffed inside a deboned duck stuffed inside a partially deboned turkey; Louisiana claims to have invented it","w":"A turducken is a three-bird roast in which a chicken is inserted inside a duck, which is inserted inside a turkey, with the cavities filled with stuffing. While layered meat dishes have a long culinary history, the modern American turducken is most strongly associated with Cajun cooking in Louisiana, particularly with Hebert's Specialty Meats in Maurice, Louisiana, which popularized it in the 1980s.","c":"round-4","s":"Cultural Oddities"},{"q":"The Ainu people of Japan and Russia have a rare ceremonial practice called 'iyomante' involving bears. What does this ceremony entail?","a":"The ritual sacrifice of a bear cub that was raised in the village, believed to send the bear's spirit back to the divine realm as a messenger","w":"In traditional Ainu belief, bears are divine beings ('kamuy') who visit the human world in animal form. Iyomante involved raising a captured bear cub for up to two years as a community member, then ritually killing and eating it in an elaborate ceremony to release its divine spirit and send it back to the spirit world laden with gifts. The practice was banned in Japan in 1955 but remains culturally significant.","c":"round-4","s":"Cultural Oddities"},{"q":"The word 'hooligan' may derive from the surname of a real family. What is the most widely cited origin story for the word?","a":"It is believed to derive from the surname of Patrick Hooligan (or the fictional Hooligans), an Irish family in London's Southwark district, notorious in the 1890s for street violence","w":"The word 'hooligan' appeared suddenly in British press reports in the summer of 1898, suggesting it was triggered by a specific event or figure. The most commonly cited origin links it to Patrick Hooligan, a real Irish criminal in Southwark, London, though a fictional gang called the Hooligans in a music hall song from the same era is also proposed. The word spread globally within a decade.","c":"round-4","s":"Cultural Oddities"},{"q":"Finland holds an annual wife-carrying world championship. What is the traditional prize awarded to the winning husband?","a":"The wife's weight in beer","w":"The Wife Carrying World Championship, held annually in Sonkajarvi, Finland since 1992, awards the winner with the carried woman's weight in beer. The sport is said to derive from a 19th-century legend about a Finnish outlaw named Ronkainen who stole women from villages, though the modern competition is entirely voluntary. Non-Finnish couples can and regularly do compete.","c":"round-4","s":"Cultural Oddities"},{"q":"The concept of 'umami,' the fifth basic taste alongside sweet, sour, salty, and bitter, was identified by a Japanese chemist in 1908. What specific food was he analyzing when he isolated it?","a":"Kombu seaweed broth","w":"Kikunae Ikeda, a chemist at the Imperial University of Tokyo, was attempting to identify what made dashi broth, particularly the kombu (kelp) component, so distinctively savory and satisfying. In 1908, he isolated glutamic acid as the compound responsible and named the taste sensation 'umami,' from Japanese words meaning 'pleasant' and 'taste.' He subsequently patented monosodium glutamate (MSG) as a way to deliver the taste.","c":"round-4","s":"Cultural Oddities"},{"q":"Through the 2022 tournament, which country had won the most FIFA World Cup titles, with five?","a":"Brazil","w":"Brazil won the World Cup in 1958, 1962, 1970, 1994, and 2002. Through 2022, Germany and Italy were next with four titles each, and Brazil had appeared at every tournament ever held.","c":"round-5","s":"Sports"},{"q":"How many Olympic medals in total did swimmer Michael Phelps win, the most of any Olympian in history?","a":"28","w":"Phelps competed at five Games from 2000 to 2016 and won 28 medals, a record 23 of them gold. Gymnast Larisa Latynina is next on the all-time list with 18.","c":"round-5","s":"Sports"},{"q":"Usain Bolt set the 100m world record of 9.58 seconds at which major athletics event?","a":"The 2009 World Championships in Berlin","w":"Bolt lowered his own world record from 9.69 to 9.58 on August 16, 2009, at the World Championships in Berlin, the largest improvement in the record of the electronic timing era.","c":"round-5","s":"Sports"},{"q":"How many Wimbledon singles titles did Roger Federer win between 2003 and 2017, a men's record at his retirement in 2022?","a":"8","w":"Federer won Wimbledon in 2003, 2004, 2005, 2006, 2007, 2009, 2012, and 2017, passing Pete Sampras's Open Era men's mark of seven. It stood as the men's record when he retired in 2022.","c":"round-5","s":"Sports"},{"q":"Muhammad Ali won an Olympic gold medal in 1960 under which name?","a":"Cassius Clay","w":"Ali, then 18 years old, competed as Cassius Marcellus Clay Jr. and won the light heavyweight gold medal at the Rome Olympics. He changed his name to Muhammad Ali in 1964 after converting to Islam and beating Sonny Liston for the heavyweight title.","c":"round-5","s":"Sports"},{"q":"Serena Williams holds the Open Era record for women's Grand Slam singles titles. How many did she win?","a":"23","w":"Williams won 23 Grand Slam singles titles in the Open Era, including seven Australian Opens, three French Opens, seven Wimbledons, and six US Opens. She held all four major titles simultaneously from 2014 to 2015, known as the 'Serena Slam.'","c":"round-5","s":"Sports"},{"q":"Tiger Woods won his fifth Masters in 2019. Which golfer holds the record with six Masters titles, the last of them in 1986?","a":"Jack Nicklaus","w":"Jack Nicklaus won the Masters in 1963, 1965, 1966, 1972, 1975, and famously in 1986 at age 46, making him the oldest Masters champion. Woods won his five green jackets in 1997, 2001, 2002, 2005, and 2019.","c":"round-5","s":"Sports"},{"q":"Through the 2024 NFL season, which two teams shared the record for the most Super Bowl wins, with six each?","a":"New England Patriots and Pittsburgh Steelers","w":"The Steelers won Super Bowls for the 1974, 1975, 1978, 1979, 2005, and 2008 seasons; the Patriots for 2001, 2003, 2004, 2014, 2016, and 2018. Both stood at six championships through the 2024 season.","c":"round-5","s":"Sports"},{"q":"Which Argentine star scored twice in the 2022 World Cup final, leading his country to their third title?","a":"Lionel Messi","w":"Messi scored a first-half penalty and an extra-time goal against France in the Qatar 2022 final, which Argentina won 4-2 on penalties after a 3-3 draw. Messi finished the tournament with seven goals and won the Golden Ball as best player.","c":"round-5","s":"Sports"},{"q":"David Beckham scored for England at the 1998, 2002, and 2006 World Cups, the first England player to score at three. How many caps did he earn?","a":"115","w":"Beckham earned 115 caps between 1996 and 2009, scoring 17 goals and captaining England 59 times. His World Cup goals came against Colombia in 1998, Argentina in 2002, and Ecuador in 2006.","c":"round-5","s":"Sports"},{"q":"London has hosted the Summer Olympics in 1908, 1948, and 2012. Which city joined it as the only other city to host three Summer Olympics as of 2024?","a":"Paris","w":"Paris hosted the Summer Olympics in 1900, 1924, and 2024, matching London's record of three Summer Games. London was the first city to achieve the feat, but Paris caught up with the 2024 edition.","c":"round-5","s":"Sports"},{"q":"Lance Armstrong was stripped of how many Tour de France titles in 2012 after a doping investigation?","a":"7","w":"Armstrong had claimed seven consecutive Tour de France victories from 1999 to 2005, then a record. On October 22, 2012, the UCI formally stripped all seven titles after the US Anti-Doping Agency published evidence of systematic doping including EPO, steroids, and blood transfusions.","c":"round-5","s":"Sports"},{"q":"Which NHL player held the all-time regular-season goals record before Alex Ovechkin broke it in April 2025?","a":"Wayne Gretzky","w":"Gretzky scored 894 regular-season goals in 1,487 games, a record that stood for 26 years after his retirement in 1999. Ovechkin broke it in April 2025. Gretzky still holds 55 other NHL records, including 2,857 career points, a mark many consider truly unbreakable.","c":"round-5","s":"Sports"},{"q":"Which 1993 Steven Spielberg film won seven Academy Awards, including Best Picture and Best Director?","a":"Schindler's List","w":"Schindler's List told the true story of Oskar Schindler saving over a thousand Jewish workers during the Holocaust and won Spielberg his first Oscar for Best Director. The film received 12 nominations in total and also won for Cinematography, Score, and Screenplay.","c":"round-5","s":"Movies & TV"},{"q":"The Shawshank Redemption (1994) has spent years at number one on IMDb's user-voted chart. What author wrote the original novella?","a":"Stephen King","w":"Frank Darabont adapted the film from King's 1982 novella 'Rita Hayworth and Shawshank Redemption.' Despite bombing at the box office and losing all seven of its Oscar nominations, it climbed IMDb's user rankings and held the number one spot for years on end.","c":"round-5","s":"Movies & TV"},{"q":"Tom Hanks won back-to-back Best Actor Oscars. Which two films earned him consecutive wins?","a":"Philadelphia (1993) and Forrest Gump (1994)","w":"Hanks won for playing an AIDS-stricken lawyer in Philadelphia at the 66th ceremony and then for the title role in Forrest Gump at the 67th. He is one of only two actors to achieve consecutive Best Actor wins, alongside Spencer Tracy who did it in 1937 and 1938.","c":"round-5","s":"Movies & TV"},{"q":"The Silence of the Lambs (1991) became only the third film ever to sweep the 'Big Five' Oscars. Who directed it?","a":"Jonathan Demme","w":"Demme's film won Best Picture, Best Director, Best Actor (Anthony Hopkins), Best Actress (Jodie Foster), and Best Adapted Screenplay, joining It Happened One Night (1934) and One Flew Over the Cuckoo's Nest (1975) in the rare 'Big Five' sweep. Hopkins' Hannibal Lecter appeared for fewer than 16 minutes on screen.","c":"round-5","s":"Movies & TV"},{"q":"Pulp Fiction won the Palme d'Or at Cannes in 1994. Who directed it?","a":"Quentin Tarantino","w":"Tarantino's non-linear crime anthology beat 22 other contenders at the 1994 Cannes Film Festival, where Clint Eastwood chaired the jury. The film was also nominated for seven Oscars, winning Best Original Screenplay, and became Miramax's first film to gross over 100 million dollars.","c":"round-5","s":"Movies & TV"},{"q":"James Cameron's Titanic (1997) was the first film to gross over 1 billion dollars worldwide. How many Academy Awards did it win?","a":"11","w":"Titanic tied Ben-Hur's all-time record by winning 11 of its 14 Oscar nominations, including Best Picture and Best Director. Made on a then-record 200 million dollar budget, it went on to earn over 2.2 billion dollars worldwide, holding the global box office record for 12 years.","c":"round-5","s":"Movies & TV"},{"q":"The Godfather (1972) won three Oscars including Best Picture. Who directed it?","a":"Francis Ford Coppola","w":"Coppola co-wrote the screenplay with Mario Puzo, adapting Puzo's bestselling novel. At the 45th Academy Awards, the film won Best Picture, Best Actor for Marlon Brando, and Best Adapted Screenplay. Interestingly, the Best Director Oscar that year went to Bob Fosse for Cabaret.","c":"round-5","s":"Movies & TV"},{"q":"In the TV series Friends, what is the name of the coffee shop where the six main characters regularly meet?","a":"Central Perk","w":"Central Perk is a fictional Greenwich Village coffeehouse that served as one of the two main gathering spots for the Friends cast across all ten seasons from 1994 to 2004. The recurring barista character Gunther, played by James Michael Tyler, was cast partly because he was the only extra who could work the espresso machine.","c":"round-5","s":"Movies & TV"},{"q":"Which AMC drama series, created by Vince Gilligan, ran for five seasons between 2008 and 2013 and starred Bryan Cranston as a chemistry teacher turned drug manufacturer?","a":"Breaking Bad","w":"Breaking Bad followed Walter White's transformation from a mild-mannered high school chemistry teacher into a ruthless methamphetamine producer. Gilligan also created the prequel series Better Call Saul (2015-2022). Breaking Bad ran for 62 episodes across its five seasons.","c":"round-5","s":"Movies & TV"},{"q":"Game of Thrones aired its controversial eighth and final season in 2019. How many episodes were in that final season?","a":"6","w":"The final season was shorter than any previous one, with six episodes running from April 14 to May 19, 2019. Earlier seasons each had ten episodes, while season seven had seven. The final four episodes all ran over 70 minutes, with episode three reaching 82 minutes, the longest in the series.","c":"round-5","s":"Movies & TV"},{"q":"Which long-running animated series, debuting in 1989, holds the Guinness World Record as the longest-running primetime scripted television series?","a":"The Simpsons","w":"The Simpsons debuted on Fox on December 17, 1989, and surpassed the previous primetime scripted record held by the Western drama Gunsmoke in April 2018. The show has aired over 800 episodes across more than 35 seasons, making it also the longest-running American sitcom.","c":"round-5","s":"Movies & TV"},{"q":"In the 1986 film Crocodile Dundee, Paul Hogan delivers the iconic line 'That's not a knife, THAT's a knife.' In which city does the scene with a mugger take place?","a":"New York City","w":"Mick Dundee and his companion Sue are confronted by a mugger with a small switchblade on a New York City street. Dundee laughs off the threat and produces a massive bowie knife. Paul Hogan wrote the line himself and was later surprised to find it enter popular culture worldwide.","c":"round-5","s":"Movies & TV"},{"q":"Which American gameshow host hosted Jeopardy! for 37 seasons, from 1984 until his death in 2020?","a":"Alex Trebek","w":"Trebek hosted the revived version of Jeopardy! from its 1984 premiere and taped his final episode on October 29, 2020, just days before he died of pancreatic cancer at age 80. He hosted more than 8,000 episodes and became one of the most recognised faces in American television.","c":"round-5","s":"Movies & TV"},{"q":"Michael Jackson's Thriller is widely recognised as the best-selling album of all time. Roughly how many copies has it sold worldwide?","a":"Around 70 million copies","w":"Released in November 1982, Thriller won a then-record eight Grammy Awards at the 1984 ceremony, including Album of the Year. Its global sales are estimated at 66 to 70 million copies, and Guinness World Records recognises it as the best-selling album ever.","c":"round-5","s":"Music"},{"q":"Queen's Bohemian Rhapsody spent nine weeks at number one in the UK when it was first released. In which year was it first released?","a":"1975","w":"Released on October 31, 1975, Bohemian Rhapsody reached UK number one on November 23 and stayed for nine weeks, taking the Christmas top spot. It returned to number one for five more weeks after Freddie Mercury's death in 1991, a second Christmas number one.","c":"round-5","s":"Music"},{"q":"Stairway to Heaven appears on which Led Zeppelin album, released in November 1971?","a":"Led Zeppelin IV","w":"The untitled fourth studio album, universally known as Led Zeppelin IV, was released on November 8, 1971, and contains Stairway to Heaven as its centrepiece. Jimmy Page wrote the guitar parts and Robert Plant wrote the lyrics during sessions at Headley Grange, Hampshire. The album has sold over 37 million copies worldwide.","c":"round-5","s":"Music"},{"q":"Nirvana's 1991 album Nevermind knocked which artist off the number one spot on the Billboard 200 in January 1992?","a":"Michael Jackson","w":"Nevermind, released on September 24, 1991, surpassed all expectations and displaced Michael Jackson's Dangerous from the top of the Billboard 200 in January 1992. The lead single Smells Like Teen Spirit is credited with bringing grunge and alternative rock into the mainstream.","c":"round-5","s":"Music"},{"q":"Bob Dylan made history in 2016 by winning which prestigious award, the first musician ever to do so?","a":"The Nobel Prize in Literature","w":"The Swedish Academy awarded Dylan the 2016 Nobel Prize in Literature 'for having created new poetic expressions within the great American song tradition.' Dylan was the first musician to receive the prize and initially did not acknowledge the award for several weeks, eventually accepting it at a private ceremony in Stockholm in April 2017.","c":"round-5","s":"Music"},{"q":"Adele's 2011 album '21' won the Grammy for Album of the Year and is the best-selling album of the 21st century. What was its lead single?","a":"Rolling in the Deep","w":"Rolling in the Deep launched '21' in November 2010 and topped charts worldwide. The album went on to sell over 31 million copies, making it the best-performing album on the Billboard 200 of all time, where it spent 24 weeks at number one. Adele won seven Grammys for the album at the 2012 ceremony.","c":"round-5","s":"Music"},{"q":"Mariah Carey's 'All I Want for Christmas Is You' was originally released in 1994. In which year did it finally reach number one in the UK for the first time?","a":"2020","w":"On its 1994 release, the song peaked at number two in the UK, kept off the top by East 17's Stay Another Day. It finally reached UK number one 26 years later in December 2020, becoming one of the most remarkable chart comeback stories in history.","c":"round-5","s":"Music"},{"q":"Which Rolling Stones 1966 single was notable for being the first number one to feature a sitar prominently on the recording?","a":"Paint It Black","w":"Brian Jones played the sitar on Paint It Black, giving the song its distinctive, brooding intro riff. Released in May 1966, it reached number one in both the UK and the US. Mick Jagger and Keith Richards wrote it while the band were on tour in Australia.","c":"round-5","s":"Music"},{"q":"Prince won an Academy Award for Best Original Song Score in 1985 for the soundtrack to which film of the same name?","a":"Purple Rain","w":"Purple Rain was released as both a film and soundtrack album in 1984, with Prince starring in the semi-autobiographical movie. The soundtrack sold 17 million copies by 1988 and included the title track, When Doves Cry, and Let's Go Crazy. Prince also won two Grammy Awards for the project.","c":"round-5","s":"Music"},{"q":"Elton John's Rocket Man was the lead single from which 1972 album?","a":"Honky Chateau","w":"Rocket Man was released in April 1972 ahead of the Honky Chateau album, which was recorded at an 18th-century chateau in Herouville, France. The song reached number two in the UK and number six in the US, and the album became John's first to reach number one in America.","c":"round-5","s":"Music"},{"q":"Which band is estimated to be the best-selling music act of all time, with over 600 million units sold worldwide?","a":"The Beatles","w":"The Beatles' total estimated sales of over 600 million units places them above all other acts. Their catalogue continues to sell strongly decades after the band broke up in 1970, and their 2000 compilation '1' remains one of their highest-selling individual releases with around 32 million copies sold.","c":"round-5","s":"Music"},{"q":"Elton John has described Bernie Taupin as his primary songwriting partner. In their collaboration, who writes the lyrics first?","a":"Bernie Taupin","w":"Taupin writes the lyrics on his own, then hands them to John, who sets them to music, often in as little as 20 to 30 minutes. The two have worked together since 1967 and have written hundreds of songs this way, a process sometimes called the reverse of how most songwriting partnerships operate.","c":"round-5","s":"Music"},{"q":"Which clear spirit forms the base of a classic Mojito cocktail, served with lime, mint, sugar, and soda water?","a":"White rum","w":"The Mojito is a traditional Cuban highball built on white (light) rum, with lime juice, sugar, fresh mint, and soda water. It is one of the world's most popular rum cocktails.","c":"round-5","s":"Geography & Food"},{"q":"Which is the smallest country in the world by both area and population, located entirely within Rome?","a":"Vatican City","w":"Vatican City covers just 0.44 square kilometres and has a population of fewer than 900 people, making it the smallest independent state in the world on both measures. It is the headquarters of the Roman Catholic Church and the official residence of the Pope.","c":"round-5","s":"Geography & Food"},{"q":"How many sovereign states share a land border with China, a total matched only by Russia?","a":"14","w":"China borders Russia, Mongolia, Kazakhstan, Kyrgyzstan, Tajikistan, Afghanistan, Pakistan, India, Nepal, Bhutan, Myanmar, Laos, Vietnam, and North Korea. Russia also counts 14 neighbours, so the two share the record.","c":"round-5","s":"Geography & Food"},{"q":"What is the official height of Mount Everest, as jointly declared by Nepal and China in 2020?","a":"8,848.86 metres (29,031.7 feet)","w":"Following new GPS and satellite surveys carried out by both Nepal and China, the two countries jointly announced the revised official height of Everest as 8,848.86 metres in December 2020, slightly higher than the previous widely used figure of 8,848 metres established in 1954.","c":"round-5","s":"Geography & Food"},{"q":"Tequila can only legally be produced in Mexico and must be made from which plant?","a":"Blue agave (Weber blue agave)","w":"Mexican law specifies that tequila must be produced from the blue agave plant, Agave tequilana Weber, and primarily in the state of Jalisco. The heart of the plant, called the pina, is harvested after 7 to 14 years, roasted, and its juice fermented and distilled.","c":"round-5","s":"Geography & Food"},{"q":"Guinness stout originated in Dublin. In which year did Arthur Guinness sign his famous 9,000-year lease on the St. James's Gate Brewery?","a":"1759","w":"Arthur Guinness signed a 9,000-year lease on the unused brewery at St. James's Gate on December 31, 1759, at an annual rent of 45 pounds. He initially brewed ales before switching to porter around 1778. The brewery became the world's largest by 1886, producing 1.2 million barrels a year.","c":"round-5","s":"Geography & Food"},{"q":"Pizza Margherita, topped with tomato, mozzarella, and basil, is associated with which Italian city?","a":"Naples","w":"The story traditionally credits Neapolitan pizzaiolo Raffaele Esposito with creating the pizza in 1889 in honour of Queen Margherita of Savoy, using toppings in the colours of the Italian flag. Historians have questioned this legend, noting that records of the combination of tomato, mozzarella, and basil on pizza in Naples date back to at least the 1860s.","c":"round-5","s":"Geography & Food"},{"q":"Sushi in its modern form, nigiri-sushi, is credited to Hanaya Yohei, who invented it in Tokyo (then called Edo) during which era of Japanese history?","a":"The Edo period (around 1824)","w":"Hanaya Yohei is credited with inventing nigiri-sushi around 1824 in the Edo period, placing fresh fish on hand-pressed vinegared rice. This was a fast-food evolution from the earlier narezushi, in which fish was fermented for months. The vinegar that replaced fermentation made the dish quick to prepare and eat.","c":"round-5","s":"Geography & Food"},{"q":"Kimjang, the traditional Korean communal practice of making kimchi, was inscribed on UNESCO's Intangible Cultural Heritage list in which year?","a":"2013","w":"UNESCO added Kimjang to its Representative List of the Intangible Cultural Heritage of Humanity in 2013. The practice involves communities coming together each autumn to make large quantities of fermented vegetable kimchi to sustain households through winter, emphasising the values of sharing and cooperation.","c":"round-5","s":"Geography & Food"},{"q":"The croissant is considered a French pastry, but it evolved from which Austrian crescent-shaped pastry?","a":"The kipferl","w":"The Austrian kipferl dates to at least the 13th century in Vienna. An Austrian artillery officer, August Zang, opened a Viennese bakery in Paris around 1838-1839 introducing the kipferl to France, where bakers adapted it into the laminated, buttery croissant we know today. The earliest recipe for the modern croissant appeared in 1905.","c":"round-5","s":"Geography & Food"},{"q":"Chocolate was consumed as a bitter drink for centuries before Europeans sweetened it. Which ancient Mesoamerican civilisations are credited with first cultivating the cacao plant?","a":"The Olmec and Maya (later also the Aztec)","w":"The earliest evidence of cacao use in Mesoamerica dates to around 2000 BCE with the Olmec culture. The Maya considered cacao sacred and incorporated it into religious rituals, while the Aztec used cacao beans as currency. When Spanish colonisers brought cacao to Europe in the 16th century, it was sweetened with sugar and became a luxury drink.","c":"round-5","s":"Geography & Food"},{"q":"Which South American river carries the greatest volume of freshwater of any river in the world, draining roughly 40 percent of the continent?","a":"The Amazon","w":"Although the Nile is generally considered longer, the Amazon River in South America discharges more freshwater into the ocean than any other river on Earth, roughly 20 percent of all freshwater entering the world's oceans. Its basin covers approximately 7 million square kilometres, about 40 percent of South America.","c":"round-5","s":"Geography & Food"},{"q":"Which part of a cell is often called the 'powerhouse of the cell' because it generates most of the cell's energy?","a":"The mitochondria","w":"Mitochondria produce most of a cell's supply of ATP, the molecule that powers cellular activity, through a process called cellular respiration. The 'powerhouse' nickname dates to the 1950s.","c":"round-6","s":"Science & Technology"},{"q":"What is the most abundant gas in Earth's atmosphere, making up about 78 percent of the air?","a":"Nitrogen","w":"Nitrogen accounts for roughly 78 percent of the atmosphere by volume, far more than oxygen at about 21 percent. Despite surrounding us, atmospheric nitrogen is largely inert and unusable by most living things until it is 'fixed' into other compounds.","c":"round-6","s":"Science & Technology"},{"q":"Which physicist developed the theory of relativity and the famous mass-energy equation E = mc^2?","a":"Albert Einstein","w":"Einstein published his special theory of relativity in 1905, introducing the equation E = mc^2, and his general theory of relativity in 1915. His work reshaped the modern understanding of space, time, and gravity.","c":"round-6","s":"Science & Technology"},{"q":"What unit measures the frequency of sound waves, commonly used to describe human hearing range?","a":"Hertz","w":"Hertz (Hz) measures cycles per second. Humans can typically hear sounds between 20 Hz and 20,000 Hz. The unit is named after German physicist Heinrich Hertz, who first conclusively proved the existence of electromagnetic waves in 1887.","c":"round-6","s":"Science & Technology"},{"q":"What part of the human body produces insulin?","a":"The pancreas","w":"Insulin is produced by beta cells in the islets of Langerhans within the pancreas. It regulates blood glucose levels by allowing cells to absorb sugar. Failure of this system results in diabetes mellitus, affecting hundreds of millions of people worldwide.","c":"round-6","s":"Science & Technology"},{"q":"What is the name of the force that keeps planets in orbit around the Sun?","a":"Gravity","w":"Gravity is the attractive force between masses described by Newton's law of universal gravitation and later refined by Einstein's general relativity. The Sun's immense mass creates a gravitational field strong enough to hold all eight planets in stable elliptical orbits.","c":"round-6","s":"Science & Technology"},{"q":"In navigation technology, what does the abbreviation 'GPS' stand for?","a":"Global Positioning System","w":"GPS is a satellite-based navigation system operated by the United States that lets a receiver calculate its precise location anywhere on Earth using timing signals from a network of orbiting satellites.","c":"round-6","s":"Science & Technology"},{"q":"Which blood type is known as the universal donor for red blood cell transfusions?","a":"O negative","w":"O negative blood lacks both A and B antigens on red blood cells and the Rh factor, so it can be transfused to patients of any blood type without triggering an immune reaction. It is critically important in emergencies when a patient's blood type is unknown.","c":"round-6","s":"Science & Technology"},{"q":"What technology allows computers to communicate over the internet by breaking data into small packets?","a":"Packet switching","w":"Packet switching divides data into small blocks that travel independently across a network and are reassembled at the destination. Developed in the 1960s, it underpins the internet's TCP/IP protocol and is far more efficient than older circuit-switching methods.","c":"round-6","s":"Science & Technology"},{"q":"What is the name of the layer of the atmosphere where weather occurs?","a":"Troposphere","w":"The troposphere is the lowest layer of Earth's atmosphere, extending roughly 12 km above the surface. It contains about 75 percent of the atmosphere's mass and almost all its water vapour, making it the site of virtually all weather phenomena.","c":"round-6","s":"Science & Technology"},{"q":"Which ancient wonder of the world stood at the entrance to the harbour of Rhodes?","a":"The Colossus of Rhodes","w":"The Colossus of Rhodes was a giant bronze statue of the sun-god Helios, completed around 280 BC after Rhodes survived a year-long siege by Demetrius Poliorcetes. About 33 metres tall, it stood just 54 years before an earthquake toppled it in 226 BC.","c":"round-6","s":"History & Literature"},{"q":"In which century did the Black Death reach Europe, killing roughly a third of its population?","a":"The 14th century","w":"The Black Death swept through Europe between 1347 and 1351, carried by fleas on rats aboard trading ships. Caused by the bacterium Yersinia pestis, it killed an estimated 30 to 60 percent of Europe's population and reshaped the continent's social, economic, and religious fabric.","c":"round-6","s":"History & Literature"},{"q":"What is the title of Charles Dickens's first novel, published in 1836?","a":"The Pickwick Papers","w":"The Posthumous Papers of the Pickwick Club was published in monthly serial installments in 1836 and 1837, making it Dickens's first full-length novel. Its comic story of Mr Pickwick and his friends became a publishing sensation and launched one of literature's greatest careers.","c":"round-6","s":"History & Literature"},{"q":"Which empire built the road network known as the 'Royal Road,' stretching from Sardis to Susa?","a":"The Persian (Achaemenid) Empire","w":"The Royal Road was constructed under King Darius I around 500 BC, spanning roughly 2,700 km across the Achaemenid Persian Empire. Equipped with relay stations for royal couriers, it allowed messages to travel from Sardis to Susa in about seven days, compared to the three months it took ordinary travellers.","c":"round-6","s":"History & Literature"},{"q":"Jane Austen's novel 'Pride and Prejudice' was first published in what year?","a":"1813","w":"Pride and Prejudice was published on January 28, 1813, by T. Egerton of London. Austen had written an early draft called 'First Impressions' in 1797. The novel's famous opening line about a single man in possession of a good fortune is one of the most recognised in English literature.","c":"round-6","s":"History & Literature"},{"q":"What name was given to the period of cultural rebirth that began in 14th-century Italy and later spread across Europe?","a":"The Renaissance","w":"The Renaissance, from the French for 'rebirth,' was a cultural movement spanning roughly the 14th to 17th centuries. Beginning in Florence and other Italian city-states, it saw renewed interest in classical Greek and Roman thought, leading to extraordinary advances in art, architecture, literature, and science.","c":"round-6","s":"History & Literature"},{"q":"Who wrote the epic poem 'The Divine Comedy,' describing a journey through Hell, Purgatory, and Paradise?","a":"Dante Alighieri","w":"Dante Alighieri wrote The Divine Comedy between 1308 and his death in 1321. The three-part poem, comprising Inferno, Purgatorio, and Paradiso, is considered the greatest work of Italian literature and a foundational text of Western culture, as well as a landmark in the development of the Italian language.","c":"round-6","s":"History & Literature"},{"q":"The Magna Carta was signed by which English king in 1215?","a":"King John","w":"King John sealed the Magna Carta at Runnymede on June 15, 1215, under pressure from rebellious barons. It established for the first time that the king was subject to the rule of law. Several of its clauses, including guarantees of due process, still influence constitutional law today.","c":"round-6","s":"History & Literature"},{"q":"In George Orwell's novel '1984,' what is the name of the totalitarian superstate in which the story is set?","a":"Oceania","w":"Oceania is one of three totalitarian superstates in Orwell's dystopian novel, published in 1949. Ruled by 'Big Brother' and the Party, it encompasses the British Isles, the Americas, and parts of Africa and Australasia. The novel coined terms like 'doublethink,' 'thoughtcrime,' and 'Newspeak' that remain in everyday use.","c":"round-6","s":"History & Literature"},{"q":"Which civilisation built the city of Machu Picchu in the mountains of present-day Peru?","a":"The Inca","w":"Machu Picchu was built by the Inca emperor Pachacuti around 1450 AD and abandoned roughly a century later, probably during the Spanish conquest. Situated at about 2,430 metres above sea level in the Andes, it remained unknown to the outside world until Hiram Bingham brought it to international attention in 1911.","c":"round-6","s":"History & Literature"},{"q":"Which European capital city is split by the River Danube into its historic halves, Buda and Pest?","a":"Budapest","w":"Budapest, the capital of Hungary, was formed in 1873 by uniting Buda and Obuda on the west bank of the Danube with Pest on the east bank.","c":"round-6","s":"Geography"},{"q":"What is the largest country in the world by land area, the only one spanning eleven time zones?","a":"Russia","w":"Russia covers about 17 million square kilometres, making it by far the largest country on Earth by area and the only nation spanning eleven time zones.","c":"round-6","s":"Geography"},{"q":"The ancient city of Petra, with its monumental facades carved into rose-red rock, is a famous archaeological site in which present-day country?","a":"Jordan","w":"Petra was the capital of the Nabataean kingdom more than two thousand years ago and is now Jordan's most-visited tourist attraction.","c":"round-6","s":"Geography"},{"q":"Which U.S. state is the largest by total area, more than twice the size of Texas?","a":"Alaska","w":"Alaska covers about 1.7 million square kilometres, making it the largest U.S. state by area, bigger than the next three largest states combined, though one of the least densely populated.","c":"round-6","s":"Geography"},{"q":"What is the name of the large desert that covers much of northern Africa?","a":"The Sahara","w":"The Sahara is the world's largest hot desert, covering approximately 9.2 million square kilometres across 11 African countries. The name comes from the Arabic word 'sahra,' meaning desert. Despite its arid reputation, it contains mountains, oases, and evidence that it was once far greener.","c":"round-6","s":"Geography"},{"q":"Which two countries share the world's longest land border?","a":"Canada and the United States","w":"The Canada-US border stretches about 8,891 km, making it the longest international land border in the world. It runs along the 49th parallel through much of its length and is notable for being undefended, reflecting the peaceful relationship between the two nations.","c":"round-6","s":"Geography"},{"q":"In which body of water is the island of Crete located?","a":"The Mediterranean Sea","w":"Crete lies in the eastern Mediterranean Sea and is the largest of the Greek islands. It was home to the Minoan civilisation, one of the earliest advanced cultures in Europe, which flourished from about 2700 to 1450 BC and gave rise to legends of the Minotaur and the labyrinth.","c":"round-6","s":"Geography"},{"q":"What is the name of the mountain range that forms the natural border between Europe and Asia?","a":"The Ural Mountains","w":"The Ural Mountains run north to south through Russia for about 2,500 km and are conventionally regarded as the boundary between Europe and Asia. They are one of the world's oldest mountain ranges and are rich in mineral resources including iron ore and coal.","c":"round-6","s":"Geography"},{"q":"Which African country is home to the most pyramids in the world, even more than Egypt?","a":"Sudan","w":"Sudan has roughly 200 to 255 ancient pyramids, more than Egypt's roughly 130. They were built by rulers of the Nubian Kingdom of Kush, whose later capital was Meroe, between about 700 BC and 350 AD, and are steeper and narrower than Egyptian pyramids.","c":"round-6","s":"Geography"},{"q":"The city of Istanbul straddles two continents. Which two?","a":"Europe and Asia","w":"Istanbul is the only major city in the world to span two continents, sitting astride the Bosphorus strait that divides Europe from Asia. The European side was the ancient city of Constantinople, while the Asian side is known as Anatolia or Asia Minor. The city was capital of three successive empires: Roman, Byzantine, and Ottoman.","c":"round-6","s":"Geography"},{"q":"Who painted the ceiling of the Sistine Chapel in the Vatican?","a":"Michelangelo","w":"Michelangelo painted the Sistine Chapel ceiling between 1508 and 1512, commissioned by Pope Julius II. The project covered over 500 square metres and included the iconic 'Creation of Adam.' Michelangelo reportedly preferred sculpture and initially resisted the commission.","c":"round-6","s":"The Arts"},{"q":"In classical music, how many symphonies did Ludwig van Beethoven complete?","a":"Nine","w":"Beethoven completed nine numbered symphonies between 1800 and 1824. His Ninth Symphony, which includes the 'Ode to Joy' choral finale, was composed when he was almost entirely deaf. It premiered in Vienna in 1824 and remains one of the most performed orchestral works in the world.","c":"round-6","s":"The Arts"},{"q":"Which Shakespeare play features the line 'To be, or not to be, that is the question'?","a":"Hamlet","w":"The line opens the most famous soliloquy in English drama, spoken by Prince Hamlet in Act 3, Scene 1, as he contemplates the suffering of life versus the uncertainty of death. The play, probably written around 1600-1601, is Shakespeare's longest and among his most studied works.","c":"round-6","s":"The Arts"},{"q":"What is the name of the Spanish architect whose mosaic-covered buildings dominate the skyline of Barcelona?","a":"Antoni Gaudi","w":"Antoni Gaudi (1852-1926) created an unmistakable style blending Gothic, Art Nouveau, and organic forms. His works in Barcelona, including the Sagrada Familia, Park Guell, and Casa Batllo, are UNESCO World Heritage Sites. Gaudi was deeply religious and devoted the last years of his life entirely to the Sagrada Familia.","c":"round-6","s":"The Arts"},{"q":"Which Dutch post-Impressionist painter created 'The Starry Night' in 1889?","a":"Vincent van Gogh","w":"Van Gogh painted The Starry Night in June 1889 while a patient at the Saint-Paul-de-Mausole asylum in Saint-Remy-de-Provence, France. The swirling night sky over a village is now housed at the Museum of Modern Art in New York and is one of the most recognised paintings in Western art.","c":"round-6","s":"The Arts"},{"q":"What is the name of the long narrative poem by Homer that describes the wanderings of Odysseus after the Trojan War?","a":"The Odyssey","w":"The Odyssey is one of two great ancient Greek epics attributed to Homer, composed around the 8th century BC. It follows Odysseus on his ten-year journey home to Ithaca after the fall of Troy, encountering monsters, gods, and temptations along the way. It remains a cornerstone of Western literature.","c":"round-6","s":"The Arts"},{"q":"Which opera by Giacomo Puccini features the aria 'Nessun Dorma'?","a":"Turandot","w":"Turandot is Puccini's final opera, left unfinished at his death in 1924 and completed by Franco Alfano. 'Nessun Dorma,' sung by the tenor Calaf in Act 3, became widely known after Luciano Pavarotti performed it at the 1990 FIFA World Cup in Italy, turning it into one of opera's most popular arias.","c":"round-6","s":"The Arts"},{"q":"What art movement, originating in France in the 1860s, was named mockingly after a painting by Claude Monet?","a":"Impressionism","w":"Impressionism got its name from critic Louis Leroy, who mockingly cited Monet's 1872 painting 'Impression, Sunrise' after the first Impressionist exhibition in 1874. The movement rejected academic formalism in favour of capturing light and colour in the moment, revolutionising Western painting.","c":"round-6","s":"The Arts"},{"q":"In which city is the Prado Museum, one of the world's foremost art galleries, located?","a":"Madrid","w":"The Museo Nacional del Prado in Madrid opened in 1819 and houses one of the world's finest collections of European art, with particular strength in Spanish, Flemish, and Italian painting. Its holdings include major works by Velazquez, Goya, El Greco, Raphael, Titian, and Rubens.","c":"round-6","s":"The Arts"},{"q":"Who wrote the play 'A Doll's House,' a landmark of modern drama first performed in 1879?","a":"Henrik Ibsen","w":"Norwegian playwright Henrik Ibsen wrote A Doll's House, which premiered in Copenhagen in December 1879. The play's ending, in which Nora slams the door on her husband and leaves her family in search of self-fulfilment, sparked enormous controversy across Europe and is seen as a founding work of feminist theatre.","c":"round-6","s":"The Arts"},{"q":"What is the architectural style of the Notre-Dame Cathedral in Paris, featuring pointed arches and flying buttresses?","a":"Gothic","w":"Notre-Dame de Paris is a masterpiece of French Gothic architecture, begun in 1163 and largely completed by the mid-13th century. Gothic style is characterised by pointed arches, ribbed vaulting, and flying buttresses that allow walls to be thinner and windows larger. The cathedral was severely damaged by fire in April 2019 and has since undergone extensive restoration.","c":"round-6","s":"The Arts"},{"q":"Which composer wrote 'The Four Seasons,' a set of violin concertos published in 1725?","a":"Antonio Vivaldi","w":"The Four Seasons (Le quattro stagioni) by Antonio Vivaldi is a set of four violin concertos from his Opus 8 collection, published in Amsterdam in 1725. Each concerto depicts a different season and is accompanied by a sonnet. It remains among the most frequently recorded pieces of Baroque music.","c":"round-6","s":"The Arts"},{"q":"What is the term for a Japanese art form of folding paper into decorative shapes and figures?","a":"Origami","w":"Origami, from the Japanese words 'oru' (to fold) and 'kami' (paper), is the traditional art of paper-folding. Although paper was brought to Japan from China around the 6th century, origami developed as a distinct art form in Japan. The crane is its most iconic subject and a symbol of peace and longevity.","c":"round-6","s":"The Arts"},{"q":"Which American author wrote 'To Kill a Mockingbird,' published in 1960 and awarded the Pulitzer Prize?","a":"Harper Lee","w":"Harper Lee published To Kill a Mockingbird in 1960, and it won the Pulitzer Prize for Fiction in 1961. Set in the fictional Alabama town of Maycomb during the 1930s, it examines racial injustice through the eyes of young Scout Finch and her lawyer father Atticus. It sold more than 30 million copies and became required reading in schools worldwide.","c":"round-6","s":"The Arts"},{"q":"What was the name of the legal code issued by the Byzantine Emperor Justinian I in 529 AD, consolidating centuries of Roman law?","a":"The Corpus Juris Civilis (Code of Justinian)","w":"The Corpus Juris Civilis, compiled under Justinian I between 529 and 534 AD, systematised over 1,000 years of Roman legal tradition into four parts. It became the foundation of civil law in continental Europe and remains the basis for legal systems in France, Germany, Italy, and dozens of other countries today.","c":"round-7","s":"Expert History"},{"q":"Which Central Asian conqueror sacked Delhi in 1398, reportedly killing tens of thousands of its inhabitants?","a":"Timur (Tamerlane)","w":"Timur, also known as Tamerlane, led his forces into the Sultanate of Delhi in 1398, massacring a large portion of the population. Contemporary accounts describe enormous pyres of bodies and the city left nearly depopulated for years. The raid is one of the most catastrophic events in Delhi's history and severely weakened the Tughlaq dynasty.","c":"round-7","s":"Expert History"},{"q":"The Battle of Adwa in 1896, a decisive victory for Ethiopia, ended an attempted invasion by which European power?","a":"Italy","w":"At the Battle of Adwa on March 1, 1896, Emperor Menelik II's Ethiopian forces decisively defeated the invading Italian army, killing or capturing about half of the Italian force. It was the most significant African military victory over a European colonial power during the Scramble for Africa and kept Ethiopia independent until Mussolini's 1935 invasion.","c":"round-7","s":"Expert History"},{"q":"What was the name of the secret protocol appended to the Molotov-Ribbentrop Pact of 1939 that divided Eastern Europe into German and Soviet spheres of influence?","a":"The Secret Additional Protocol","w":"The Molotov-Ribbentrop Pact signed on August 23, 1939 included a secret supplementary protocol dividing Poland, Finland, Estonia, Latvia, Lithuania, and Romania between Nazi Germany and the Soviet Union. The Soviet government denied its existence until 1989; its revelation was a key moment in Baltic independence movements.","c":"round-7","s":"Expert History"},{"q":"Which Ottoman sultan conquered Constantinople in 1453, ending the Byzantine Empire?","a":"Mehmed II (Mehmed the Conqueror)","w":"Mehmed II, then just 21 years old, captured Constantinople on May 29, 1453 after a 53-day siege. The fall ended over 1,000 years of Byzantine rule and is conventionally used by historians to mark the end of the Middle Ages. Mehmed transformed the city into the Ottoman capital and converted the great Hagia Sophia into a mosque.","c":"round-7","s":"Expert History"},{"q":"The Taiping Rebellion, among the bloodiest civil wars in human history with an estimated 20 million or more deaths, was fought in the mid-19th century in which country?","a":"China","w":"Led by Hong Xiuquan, who claimed to be the younger brother of Jesus, the Taiping Rebellion raged from 1850 to 1864 against the ruling Qing dynasty and is estimated to have caused 20 to 30 million deaths.","c":"round-7","s":"Expert History"},{"q":"What was the occupation of Robespierre before the French Revolution made him its most feared leader?","a":"Lawyer","w":"Maximilien Robespierre trained as a lawyer in Arras, where he gained a reputation for defending the poor. Elected to the Estates-General in 1789, he rose through the Revolution to dominate the Committee of Public Safety and oversee the Reign of Terror, during which some 17,000 people were officially executed. He was guillotined in July 1794.","c":"round-7","s":"Expert History"},{"q":"The Scramble for Africa was formalised at a conference held in which European city in 1884 to 1885?","a":"Berlin","w":"The Berlin Conference of 1884 to 1885, convened by Otto von Bismarck, established the rules by which European powers would partition Africa. Fourteen nations attended; no African representatives were present. The conference led to the formalisation of colonial borders that still largely define African nations today.","c":"round-7","s":"Expert History"},{"q":"Which naval battle in 31 BC decided the fate of the Roman Empire, defeating the combined forces of Mark Antony and Cleopatra?","a":"The Battle of Actium","w":"The Battle of Actium, fought on September 2, 31 BC off the coast of Greece, saw Octavian's fleet under Marcus Agrippa defeat the combined naval forces of Mark Antony and Cleopatra VII. Both Antony and Cleopatra fled to Egypt and later died by suicide. Octavian became the undisputed ruler of Rome, was renamed Augustus, and became the first Roman Emperor.","c":"round-7","s":"Expert History"},{"q":"What was the name of the 1494 treaty that divided the newly discovered territories of the Americas between Spain and Portugal?","a":"The Treaty of Tordesillas","w":"The Treaty of Tordesillas, signed June 7, 1494 and brokered by Pope Alexander VI, drew a line 370 leagues west of the Cape Verde Islands. Land to the west went to Spain; land to the east to Portugal. This is why Brazil, whose eastern bulge fell east of the line, was colonised by Portugal while the rest of Latin America became Spanish.","c":"round-7","s":"Expert History"},{"q":"The Haitian Revolution produced the first Black republic in history. Which general led the final phase and declared independence in 1804?","a":"Jean-Jacques Dessalines","w":"After Toussaint Louverture was captured by the French in 1802, Jean-Jacques Dessalines took command of the revolutionary forces and decisively defeated the French expedition sent by Napoleon. He declared Haitian independence on January 1, 1804 and renamed the colony from Saint-Domingue to Haiti, an Indigenous Taino name, making it the first Black republic and the second independent nation in the Western Hemisphere.","c":"round-7","s":"Expert History"},{"q":"Which ancient Greek city-state established direct democracy around 508 BC under the constitutional reforms of Cleisthenes?","a":"Athens","w":"Cleisthenes introduced sweeping democratic reforms in Athens around 508 to 507 BC, breaking the power of aristocratic clans and giving citizens direct participation in government through the Assembly. Though limited to free adult male citizens and excluding women, slaves, and foreigners, it was the world's first direct democracy and profoundly influenced political thought for millennia.","c":"round-7","s":"Expert History"},{"q":"The Meiji Restoration of 1868 ended the rule of which military government that had controlled Japan for over 250 years?","a":"The Tokugawa Shogunate","w":"The Tokugawa Shogunate governed Japan from 1603 to 1868, a period known as the Edo era, during which the country maintained strict isolation from the outside world. The Meiji Restoration overthrew it and nominally restored power to Emperor Meiji, triggering rapid modernisation and industrialisation that transformed Japan into a major world power within decades.","c":"round-7","s":"Expert History"},{"q":"What is the name of the process by which a quantum particle can pass through a potential energy barrier it classically should not be able to cross?","a":"Quantum tunnelling","w":"Quantum tunnelling occurs because particles at the quantum scale behave as probability waves; there is a nonzero probability of finding the particle on the other side of a potential barrier. It underlies phenomena including radioactive alpha decay, the nuclear fusion reactions that power the Sun, and the operation of tunnel diodes in modern electronics.","c":"round-7","s":"Expert Science"},{"q":"Which molecule carries the genetic information from the nucleus to the ribosomes, where proteins are assembled?","a":"Messenger RNA (mRNA)","w":"Messenger RNA is transcribed from a DNA template in the nucleus and carries the coded instructions for a protein sequence out to the cytoplasm, where ribosomes translate it into a chain of amino acids. The central role of mRNA came to wider public awareness with the development of mRNA-based COVID-19 vaccines by Moderna and Pfizer-BioNTech.","c":"round-7","s":"Expert Science"},{"q":"What is the Chandrasekhar limit, and what happens to a white dwarf star that exceeds it?","a":"About 1.4 solar masses; the white dwarf collapses and typically triggers a Type Ia supernova","w":"Subrahmanyan Chandrasekhar calculated in 1930 that a white dwarf cannot exceed about 1.4 times the mass of the Sun while remaining supported by electron degeneracy pressure. If it accretes enough mass to exceed this limit, electron degeneracy fails, the core collapses, and the resulting runaway nuclear fusion causes a Type Ia supernova explosion that can briefly outshine an entire galaxy.","c":"round-7","s":"Expert Science"},{"q":"In chemistry, what term describes molecules that are non-superimposable mirror images of each other, like left and right hands?","a":"Enantiomers","w":"Enantiomers are pairs of molecules with the same connectivity of atoms but arranged as non-superimposable mirror images, a property called chirality. They can behave very differently biologically: one enantiomer of a drug may be therapeutic while the other is inactive or harmful, as tragically illustrated by the drug thalidomide, whose S-enantiomer caused severe birth defects.","c":"round-7","s":"Expert Science"},{"q":"What is the name of the point inside a black hole where the known laws of physics break down and density becomes theoretically infinite?","a":"The singularity","w":"At the centre of a black hole, general relativity predicts that matter is compressed to a point of infinite density called a singularity, where spacetime curvature becomes infinite and the laws of physics as currently understood cease to apply. A full theory of quantum gravity, which does not yet exist, would be needed to describe what actually occurs at or near a singularity.","c":"round-7","s":"Expert Science"},{"q":"What is the name of the protein complex that acts as the cell's primary waste disposal system, degrading damaged or unneeded proteins tagged with ubiquitin?","a":"The proteasome","w":"The proteasome is a large barrel-shaped protein complex that degrades misfolded, damaged, or obsolete proteins by unfolding and cleaving them. Proteins are targeted for degradation by attachment of ubiquitin chains. Aaron Ciechanover, Avram Hershko, and Irwin Rose shared the 2004 Nobel Prize in Chemistry for discovering this ubiquitin-mediated proteolysis system.","c":"round-7","s":"Expert Science"},{"q":"Which element, with atomic number 43, was the first to be artificially produced rather than found in nature?","a":"Technetium","w":"Technetium (Tc, atomic number 43) was synthesised in 1937 by Carlo Perrier and Emilio Segre by bombarding molybdenum with deuterons in a cyclotron, making it the first artificially produced element. It has no stable isotopes, which explains why it does not occur in significant quantities in nature despite being a relatively light element.","c":"round-7","s":"Expert Science"},{"q":"In ecology, what term describes a species whose removal from an ecosystem causes a disproportionately large effect, far beyond what its abundance would suggest?","a":"A keystone species","w":"The keystone species concept was introduced by ecologist Robert Paine in 1969 after he removed sea stars from a tidal zone and found the community collapsed to a monoculture of mussels. The classic terrestrial example is wolves in Yellowstone: their reintroduction in 1995 triggered cascading changes in vegetation, riverbanks, and dozens of other species through trophic cascades.","c":"round-7","s":"Expert Science"},{"q":"What is Olbers's Paradox, and what is the accepted modern resolution?","a":"Why is the night sky dark if the universe contains infinitely many stars? The resolution is that the universe has a finite age, so light from the most distant objects has not had time to reach us.","w":"Heinrich Olbers popularised the paradox in 1823: in an infinite, eternal, static universe uniformly filled with stars, every line of sight would eventually hit a stellar surface, making the entire night sky as bright as the Sun. Modern cosmology resolves this because the Big Bang occurred about 13.8 billion years ago, limiting how far light has travelled, and the universe's expansion redshifts distant light below visible wavelengths.","c":"round-7","s":"Expert Science"},{"q":"What thermodynamic effect describes the temperature change of a real gas forced through a porous plug or valve at constant enthalpy, the working principle behind most gas liquefaction?","a":"The Joule-Thomson effect","w":"For most gases at room temperature, throttling causes cooling, the basis of refrigeration and gas liquefaction. Hydrogen and helium instead warm slightly, because room temperature lies above their inversion temperatures.","c":"round-7","s":"Expert Science"},{"q":"Which 17th-century natural philosopher articulated the principles of superposition and original horizontality, establishing the foundations of stratigraphy?","a":"Nicolas Steno","w":"Nicolas Steno articulated the law of superposition and the principle of original horizontality in his 1669 work Dissertationis Prodromus. These foundational principles of stratigraphy established that rock layers record time sequentially, making it possible to read geological history from cross-sections of exposed rock. Steno also correctly identified fossils as the remains of once-living organisms, a revolutionary claim at the time.","c":"round-7","s":"Expert Science"},{"q":"What is the name of the curve along which a ball rolls from one point to another in the shortest possible time under gravity, the solution to the brachistochrone problem?","a":"A cycloid","w":"The brachistochrone problem was posed by Johann Bernoulli in 1696 and solved independently by Newton, Leibniz, L'Hopital, and both Bernoullis. The answer is a cycloid, the curve traced by a point on the rim of a rolling circle. The problem was foundational in the development of the calculus of variations, a branch of mathematics that optimises entire functions rather than individual values.","c":"round-7","s":"Expert Science"},{"q":"What phenomenon, first observed in 1986 by Bednorz and Muller, earned them the Nobel Prize in Physics the following year?","a":"High-temperature superconductivity in copper-oxide ceramics","w":"In 1986 Georg Bednorz and K. Alex Muller discovered superconductivity in a lanthanum barium copper oxide ceramic at around 35 K, far above the previous record. The discovery earned them the 1987 Nobel Prize in Physics. Subsequent cuprate compounds achieved superconductivity above 130 K, but the underlying mechanism remains incompletely understood and is one of the major open problems in condensed matter physics.","c":"round-7","s":"Expert Science"},{"q":"Which 20th-century composer wrote 'The Rite of Spring,' whose premiere in Paris in 1913 famously caused a riot in the audience?","a":"Igor Stravinsky","w":"The premiere of The Rite of Spring (Le Sacre du Printemps) at the Theatre des Champs-Elysees on May 29, 1913 descended into chaos as the audience booed and fought over the radical dissonances, irregular rhythms, and Nijinsky's unconventional choreography. Stravinsky himself fled the theatre in distress. The work is now regarded as one of the most important orchestral compositions of the 20th century.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Francisco Goya's late work 'Saturn Devouring His Son' was originally painted directly onto the walls of his house. What was the name of that house?","a":"Quinta del Sordo (House of the Deaf Man)","w":"Goya painted Saturn Devouring His Son and the other 'Black Paintings' directly onto the plaster walls of his home, the Quinta del Sordo, between 1819 and 1823. The name refers to a previous deaf owner, not Goya, though he too was profoundly deaf by then. The paintings were transferred to canvas in 1874 and are now in the Prado Museum in Madrid.","c":"round-7","s":"Expert Culture & Arts"},{"q":"The literary technique 'stream of consciousness' is closely associated with the 1925 novel 'Mrs Dalloway.' Who wrote it?","a":"Virginia Woolf","w":"Virginia Woolf published Mrs Dalloway in 1925, employing a radical stream-of-consciousness technique that moves fluidly between the inner thoughts of multiple characters over a single day in London. Along with James Joyce's Ulysses (published 1922), it redefined what the novel could do with interiority, time, and subjective experience.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Which Flemish Baroque painter was also a diplomat who negotiated peace between Spain and England in 1630, earning knighthoods from both monarchies?","a":"Peter Paul Rubens","w":"Peter Paul Rubens (1577-1640) was simultaneously the most influential painter in northern Europe and a skilled diplomat who negotiated a peace treaty between Spain and England, earning knighthoods from both King Philip IV and King Charles I. His studio in Antwerp was the most productive in Europe, employing dozens of assistants including the young Anthony van Dyck.","c":"round-7","s":"Expert Culture & Arts"},{"q":"What is the name of the long poem by T.S. Eliot, published in 1922, that opens with the line 'April is the cruellest month'?","a":"The Waste Land","w":"The Waste Land, published in October 1922 in The Criterion, is widely regarded as the most important poem of the 20th century. Eliot wrote it partly while recovering from a nervous breakdown; Ezra Pound edited it heavily and is honoured in the dedication as 'il miglior fabbro.' Its fragmented structure and multilingual allusions reflected the disillusionment of post-World War I Europe.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Which Viennese composer established the 12-tone technique (dodecaphony) as a systematic compositional method around 1921 to 1923?","a":"Arnold Schoenberg","w":"Arnold Schoenberg developed the 12-tone technique, using it fully for the first time in his Piano Suite Op. 25. The method treats all 12 pitches of the chromatic scale as equal, avoiding the hierarchical relationships of tonal harmony. His students Alban Berg and Anton Webern extended the technique, and the three together form what is known as the Second Viennese School.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Which Canadian-American architect designed the Guggenheim Museum in Bilbao, Spain, opened in 1997?","a":"Frank Gehry","w":"Frank Gehry's Guggenheim Museum Bilbao is encased in titanium panels that shift colour with changing light. The building is credited with the 'Bilbao Effect,' the idea that a single iconic building can regenerate an entire city. It drew nearly four million visitors in its first three years and transformed Bilbao from a declining industrial port into a global cultural destination.","c":"round-7","s":"Expert Culture & Arts"},{"q":"In Japanese Noh theatre, what is the term for the principal actor, the role for which the carved wooden masks are reserved?","a":"The shite","w":"The shite carries the main role in Noh, Japan's oldest surviving theatre, often a spirit or demon in a carved omote mask, though roles as living men are played bare-faced. Zeami Motokiyo codified the art in the late 14th century.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Marcel Duchamp's 'Fountain,' a porcelain urinal submitted to an exhibition in 1917, is considered a foundational work of which art movement?","a":"Dada","w":"Duchamp's Fountain, a manufactured urinal signed 'R. Mutt,' was submitted to the Society of Independent Artists exhibition in New York in 1917 and rejected by the selection committee. The work challenged the definition of art itself by proposing that context and authorial intent, rather than craft or aesthetics, could make an everyday object into art. It is a cornerstone of Dadaism and conceptual art.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Which Russian novelist wrote 'The Brothers Karamazov,' published in 1879 to 1880 and widely considered among the greatest novels ever written?","a":"Fyodor Dostoevsky","w":"The Brothers Karamazov was the last novel Dostoevsky completed before his death in 1881. It explores questions of faith, free will, morality, and the existence of God through the story of three brothers and the murder of their father. Sigmund Freud called it the greatest novel ever written, and it profoundly influenced Nietzsche, Einstein, Kafka, and many others.","c":"round-7","s":"Expert Culture & Arts"},{"q":"What is the Baroque term for the technique of dramatic contrast between light and dark used to powerful effect by Caravaggio, in which figures emerge from near-total darkness?","a":"Tenebrism (a heightened form of chiaroscuro)","w":"Caravaggio elevated chiaroscuro, the general use of light-dark contrast, to an extreme form called tenebrism, in which figures are dramatically lit against near-total darkness. His approach transformed European painting and directly influenced artists from Rubens and Rembrandt to Artemisia Gentileschi and Velazquez, making him one of the most consequential painters in Western art history.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Which Argentinian writer, famous for labyrinths and metafiction, wrote the short story collection 'Ficciones' published in 1944?","a":"Jorge Luis Borges","w":"Jorge Luis Borges published Ficciones in 1944, a collection of stories that play with infinite libraries, circular time, encyclopedias of imaginary worlds, and the nature of fiction itself. He is considered a founding figure of magic realism and postmodern literature, profoundly influencing Gabriel Garcia Marquez, Umberto Eco, and Salman Rushdie, among many others.","c":"round-7","s":"Expert Culture & Arts"},{"q":"The Parthenon sculptures held by the British Museum were removed from Athens in the early 19th century by which British diplomat?","a":"Lord Elgin (Thomas Bruce, 7th Earl of Elgin)","w":"Thomas Bruce, 7th Earl of Elgin, served as British Ambassador to the Ottoman Empire and between 1801 and 1812 removed about half the surviving sculptures from the Parthenon with permission from the Ottoman authorities who then controlled Greece. He sold them to the British Museum in 1816 for less than his removal costs. The question of their return to Athens has been debated ever since.","c":"round-7","s":"Expert Culture & Arts"},{"q":"In The Wizard of Oz, what kind of animal is Dorothy's pet Toto?","a":"A dog","w":"Toto was played in the 1939 film by a Cairn Terrier named Terry, a seasoned Hollywood dog. Terry reportedly earned a higher weekly salary than some of the human actors playing Munchkins.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In the Pixar film Finding Nemo, what species of fish are Nemo and his father Marlin?","a":"Clownfish","w":"The 2003 film follows a clownfish father crossing the ocean to find his son. Real clownfish live safely among stinging sea anemones, protected by a special mucus coating on their skin.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What is the name of the friendly snowman brought to life in Disney's Frozen?","a":"Olaf","w":"Olaf is built by Elsa and dreams of experiencing summer, blissfully unaware of what heat does to snow. Frozen won the Academy Award for Best Animated Feature, and 'Let It Go' won Best Original Song.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In The Empire Strikes Back, which villain reveals that he is Luke Skywalker's father?","a":"Darth Vader","w":"The 1980 reveal is one of the most famous twists in cinema history. The actual line is 'No, I am your father,' though it is almost universally misquoted as 'Luke, I am your father.'","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In which 1994 film does Tom Hanks say that life is like a box of chocolates?","a":"Forrest Gump","w":"Forrest repeats his mama's saying while telling his life story from a bus stop bench. The role earned Tom Hanks his second consecutive Best Actor Oscar, right after his win for Philadelphia.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What kind of animal terrorizes the beach town of Amity Island in the 1975 blockbuster Jaws?","a":"A great white shark","w":"Steven Spielberg's mechanical shark, nicknamed Bruce after his lawyer, broke down so often that the film shows it sparingly. Critics credit those malfunctions with making the movie scarier.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In E.T. the Extra-Terrestrial, what candy does Elliott use to lure E.T. into his house?","a":"Reese's Pieces","w":"The filmmakers first approached Mars about using M&M's and were turned down. Hershey said yes, and sales of Reese's Pieces reportedly soared after the film's 1982 release.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which actor plays Captain Jack Sparrow in the Pirates of the Caribbean films?","a":"Johnny Depp","w":"Depp modeled the swaggering pirate partly on Rolling Stones guitarist Keith Richards, who later appeared in the series as Jack's father. The first film, The Curse of the Black Pearl, came out in 2003.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In Home Alone, what is the name of the boy accidentally left behind by his family at Christmas?","a":"Kevin McCallister","w":"Played by Macaulay Culkin, eight-year-old Kevin defends his house against two burglars with homemade booby traps. The 1990 film became one of the highest-grossing comedies ever made.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which 1993 Steven Spielberg film features a theme park where dinosaurs are recreated from ancient DNA?","a":"Jurassic Park","w":"Based on Michael Crichton's novel, the film blended animatronics with groundbreaking computer graphics. Its lifelike T. rex helped make it the highest-grossing film in the world at the time.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In which fictional town do Homer, Marge, Bart, Lisa, and Maggie Simpson live?","a":"Springfield","w":"Creator Matt Groening chose Springfield partly because it is one of the most common town names in the United States. The show has kept the family's home state a running mystery for decades.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What is the name of the underwater city where SpongeBob SquarePants lives?","a":"Bikini Bottom","w":"SpongeBob lives there in a pineapple next door to his grumpy neighbor Squidward. The show was created by Stephen Hillenburg, a former marine biology teacher who first drew the characters for an educational comic.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which whip-cracking movie archaeologist, played by Harrison Ford, is famously afraid of snakes?","a":"Indiana Jones","w":"George Lucas named the hero after his own pet Alaskan Malamute, Indiana. The same beloved dog also served as the inspiration for Chewbacca in Star Wars.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What breed of dog is the cartoon mystery-solver Scooby-Doo?","a":"A Great Dane","w":"Scooby debuted in 1969 alongside Shaggy, Fred, Daphne, and Velma. His name came from Frank Sinatra's scat line 'doo-be-doo-be-doo' at the end of the song 'Strangers in the Night.'","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What is the name of Mickey Mouse's pet dog?","a":"Pluto","w":"Pluto is unusual among Disney characters because he behaves like a real dog, while Goofy, also a dog, walks upright, talks, and wears clothes. Pluto first appeared in 1930, the same year the planet Pluto was named.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In the cartoons, what is the favorite food of the Teenage Mutant Ninja Turtles?","a":"Pizza","w":"The four crime-fighting turtles are named after Renaissance artists: Leonardo, Michelangelo, Donatello, and Raphael. Their nonstop pizza cravings became a signature gag of the 1987 animated series.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What food is Winnie the Pooh always trying to get his paws on?","a":"Honey","w":"A.A. Milne's stories, first published in 1926, were inspired by his son Christopher Robin and his stuffed bear. Pooh famously spells his favorite food 'hunny' on the jars.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In the classic fairy tale, what item does Cinderella leave behind as she flees the royal ball?","a":"A glass slipper","w":"The prince searches the kingdom with the slipper, which fits no one but Cinderella. In the story, her enchanted coach turns back into a pumpkin when the magic runs out at midnight.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which fairy tale heroine lets down her extraordinarily long hair from a tall tower?","a":"Rapunzel","w":"In the Brothers Grimm tale, the witch and the prince climb the tower using her hair as a rope. Rapunzel is named after a salad plant her mother craved during pregnancy.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In Disney's Lady and the Tramp, what dish do the two dogs famously share on a date?","a":"Spaghetti","w":"The dogs accidentally kiss while eating the same strand of spaghetti behind an Italian restaurant. Walt Disney reportedly wanted to cut the scene, doubting it could work, and it became the most famous moment in the film.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In the Peanuts comic strip, what kind of animal is Snoopy?","a":"A beagle","w":"Charles Schulz's beagle sleeps on top of his doghouse and daydreams of being a World War I flying ace. Snoopy even became NASA's safety mascot during the Apollo era.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which superhero from the planet Krypton is known as the Man of Steel?","a":"Superman","w":"Superman debuted in Action Comics No. 1 in 1938, created by Jerry Siegel and Joe Shuster. He hides in plain sight as mild-mannered newspaper reporter Clark Kent.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What kind of creature bites Peter Parker and gives him his superpowers?","a":"A radioactive spider","w":"Spider-Man first appeared in the 1962 comic Amazing Fantasy No. 15, created by Stan Lee and Steve Ditko. The bite gives Peter wall-crawling, super strength, and a tingling spider-sense.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which arcade game star is a yellow circle that eats dots while being chased by four ghosts?","a":"Pac-Man","w":"Released by Namco in 1980, Pac-Man was designed by Toru Iwatani, who said the shape was inspired by a pizza with a slice missing. The four ghosts are named Blinky, Pinky, Inky, and Clyde.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What is the name of the yellow electric mouse that serves as the mascot of the Pokemon franchise?","a":"Pikachu","w":"Pikachu is the constant companion of trainer Ash Ketchum in the animated series. The name combines Japanese words for the crackle of electricity and a mouse's squeak.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"In the board game Monopoly, how much money do you collect each time you pass Go?","a":"200 dollars","w":"Collecting 200 dollars for passing Go is one of the game's most famous rules. Monopoly's classic street names were taken from Atlantic City, New Jersey, when the game took off in the 1930s.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which British band was made up of John Lennon, Paul McCartney, George Harrison, and Ringo Starr?","a":"The Beatles","w":"Formed in Liverpool, the Beatles became the best-selling music act of all time. In April 1964 they held all top five spots on the US singles chart in the same week, a feat never achieved before.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which artist, nicknamed the King of Pop, released the album Thriller?","a":"Michael Jackson","w":"Thriller, released in 1982, became the best-selling album of all time. Its 14-minute title video, complete with dancing zombies, redefined what a music video could be.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which rock and roll legend lived at the Graceland mansion in Memphis, Tennessee?","a":"Elvis Presley","w":"Elvis bought Graceland in 1957 at just 22 years old and lived there until his death in 1977. The mansion is now one of the most visited private homes in America.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which Swedish pop group sang the hits 'Dancing Queen' and 'Mamma Mia'?","a":"ABBA","w":"The group's name is an acronym of its members' first names: Agnetha, Bjorn, Benny, and Anni-Frid. They shot to international fame by winning the 1974 Eurovision Song Contest with 'Waterloo.'","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which British band recorded the six-minute rock epic 'Bohemian Rhapsody' in 1975?","a":"Queen","w":"Freddie Mercury wrote the song, which famously has no chorus and swings from ballad to opera to hard rock. Executives said it was far too long for radio, yet it topped the UK chart for nine weeks.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which country music legend wrote both 'Jolene' and 'I Will Always Love You'?","a":"Dolly Parton","w":"Parton has said she wrote the two classics on the very same day in 1972. Whitney Houston's 1992 cover of 'I Will Always Love You' became one of the best-selling singles ever by a female artist.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which pop star named her album 1989 after the year she was born?","a":"Taylor Swift","w":"Released in 2014 as her first full pop album, 1989 features 'Shake It Off' and 'Blank Space.' It won the Grammy for Album of the Year, making Swift the first woman to take that prize twice.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which Jamaican music legend made reggae famous worldwide with songs like 'One Love'?","a":"Bob Marley","w":"Marley and his band the Wailers carried reggae from Kingston to the world in the 1970s. His greatest-hits collection Legend became the best-selling reggae album in history.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"Which fictional British secret agent is known by the code number 007?","a":"James Bond","w":"Ian Fleming introduced Bond in the 1953 novel Casino Royale. Fleming borrowed the name from a real American bird expert whose field guide he owned, wanting the dullest name he could find.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"At what famous London address does the detective Sherlock Holmes live?","a":"221B Baker Street","w":"Arthur Conan Doyle placed Holmes and Dr. Watson at 221B Baker Street starting in 1887. The address did not actually exist when the stories were written, yet fans still mail letters there today.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What is the name of Santa's ninth reindeer, famous for his glowing red nose?","a":"Rudolph","w":"Rudolph was created in 1939 by Robert L. May for a free storybook that the Montgomery Ward department store gave away to holiday shoppers. The classic song about him became a huge hit for singing cowboy Gene Autry ten years later.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"On which date is Halloween celebrated each year?","a":"October 31","w":"Halloween traces back to the ancient Celtic festival of Samhain, which marked the end of the harvest season. Trick-or-treating became a widespread tradition in North America in the mid-20th century.","c":"round-1","s":"Pop Culture & Entertainment"},{"q":"What is the tallest animal in the world?","a":"The giraffe","w":"Giraffes can reach heights of about 5.5 meters, or 18 feet. Despite that towering neck, they have the same number of neck vertebrae as humans: just seven, each one greatly elongated.","c":"round-1","s":"Science & Nature"},{"q":"What is the largest animal ever known to have lived on Earth?","a":"The blue whale","w":"Blue whales grow up to about 30 meters long and can weigh more than 150 tonnes, heavier than any known dinosaur. A blue whale's heart alone weighs around 180 kilograms, about as heavy as an adult gorilla.","c":"round-1","s":"Science & Nature"},{"q":"What is the fastest land animal in the world?","a":"The cheetah","w":"Cheetahs can top 100 kilometers per hour in short bursts, reaching highway speed within seconds of launching. The sprint is so demanding that a chase typically lasts less than a minute and covers only a few hundred meters.","c":"round-1","s":"Science & Nature"},{"q":"What is the largest bird in the world?","a":"The ostrich","w":"The flightless ostrich can stand over 2.5 meters tall and weigh more than 100 kilograms. It also lays the largest eggs of any living bird and can sprint at around 70 kilometers per hour.","c":"round-1","s":"Science & Nature"},{"q":"What plant makes up almost the entire diet of the giant panda?","a":"Bamboo","w":"Pandas spend as much as half of every day eating bamboo because it is so poor in nutrients. Despite the vegetarian lifestyle, pandas are true bears with a digestive system built for meat.","c":"round-1","s":"Science & Nature"},{"q":"How many legs does a spider have?","a":"Eight","w":"Spiders are arachnids, a group that also includes scorpions, ticks, and mites, all with eight legs. The leg count is the quickest way to tell them apart from six-legged insects.","c":"round-1","s":"Science & Nature"},{"q":"How many hearts does an octopus have?","a":"Three","w":"Two hearts pump blood through the gills while a third serves the rest of the body. Octopus blood is also blue, because it uses a copper-based molecule instead of iron to carry oxygen.","c":"round-1","s":"Science & Nature"},{"q":"What is a group of lions called?","a":"A pride","w":"A pride is usually built around a core of related lionesses, who do most of the hunting as a team. Lions are the only truly social species among the world's big cats.","c":"round-1","s":"Science & Nature"},{"q":"Which animal is nicknamed the ship of the desert?","a":"The camel","w":"Camels earned the nickname by carrying people and goods across deserts for thousands of years. Their humps store fat, not water, which their bodies convert to energy and moisture on long treks.","c":"round-1","s":"Science & Nature"},{"q":"What is the only mammal capable of true, powered flight?","a":"The bat","w":"Flying squirrels and similar mammals can only glide, while bats genuinely fly on wings of stretched skin. With over 1,400 species, bats account for about one in five mammal species.","c":"round-1","s":"Science & Nature"},{"q":"What is a baby kangaroo called?","a":"A joey","w":"A newborn joey is about the size of a jellybean and crawls into its mother's pouch to continue developing. It stays there for months before finally hopping out into the world.","c":"round-1","s":"Science & Nature"},{"q":"What color is a polar bear's skin underneath its white fur?","a":"Black","w":"The black skin helps absorb warmth from the sun, while the fur above is actually made of translucent, hollow hairs that only look white. It is a clever double layer for surviving Arctic cold.","c":"round-1","s":"Science & Nature"},{"q":"What is the largest member of the dolphin family?","a":"The orca (killer whale)","w":"Despite the name killer whale, orcas are the biggest species of dolphin, with males reaching about 9 meters long. The label came from sailors who watched them hunt whales.","c":"round-1","s":"Science & Nature"},{"q":"Which bird is the only one able to fly backwards?","a":"The hummingbird","w":"Hummingbirds beat their wings in a figure-eight pattern, letting them hover and even reverse in midair. Some species flap more than 50 times every second.","c":"round-1","s":"Science & Nature"},{"q":"What is the closest star to Earth?","a":"The Sun","w":"The Sun is a star sitting about 150 million kilometers away, close enough that we rarely think of it as one. The next nearest star, Proxima Centauri, is roughly 40 trillion kilometers away.","c":"round-1","s":"Science & Nature"},{"q":"Which planet in our solar system is known as the Red Planet?","a":"Mars","w":"Mars looks red because its surface is covered in iron oxide, essentially rust. It is also home to Olympus Mons, a volcano about two and a half times the height of Mount Everest.","c":"round-1","s":"Science & Nature"},{"q":"What is the name of the galaxy that contains our solar system?","a":"The Milky Way","w":"The Milky Way holds somewhere between 100 and 400 billion stars, with our Sun orbiting far from the center. Its name comes from the milky band of starlight it paints across dark night skies.","c":"round-1","s":"Science & Nature"},{"q":"Water is made of hydrogen and which other element?","a":"Oxygen","w":"Every water molecule is two hydrogen atoms bonded to one oxygen atom, giving the famous formula H2O. That simple combination covers about 71 percent of Earth's surface.","c":"round-1","s":"Science & Nature"},{"q":"How many days are there in a leap year?","a":"366","w":"A leap year adds February 29 to keep the calendar in step with Earth's orbit, which takes about 365.25 days. Without leap years, the seasons would slowly drift through the calendar.","c":"round-1","s":"Science & Nature"},{"q":"What is the capital city of France?","a":"Paris","w":"Paris is nicknamed the City of Light, partly for its pioneering early street lighting. The city is arranged in a spiral of 20 numbered districts called arrondissements.","c":"round-1","s":"History & Geography"},{"q":"What is the capital city of Japan?","a":"Tokyo","w":"Tokyo was known as Edo until 1868, when the emperor moved his residence there and renamed it. Its greater metropolitan area is one of the most populous on Earth, home to well over 35 million people.","c":"round-1","s":"History & Geography"},{"q":"Which European country is famous for being shaped like a boot?","a":"Italy","w":"Italy's boot shape is so distinctive that its regions are described by it, with Puglia as the heel and Calabria as the toe. On a map, the boot appears to be kicking the island of Sicily.","c":"round-1","s":"History & Geography"},{"q":"How many continents are there on Earth?","a":"Seven","w":"The standard list is Africa, Antarctica, Asia, Australia, Europe, North America, and South America. Asia is by far the biggest, holding about 60 percent of the world's population.","c":"round-1","s":"History & Geography"},{"q":"What is the smallest country in the world?","a":"Vatican City","w":"Vatican City covers about half a square kilometer inside the city of Rome, with a population only in the hundreds. It became an independent state in 1929 and is the home of the Pope.","c":"round-1","s":"History & Geography"},{"q":"What is the largest country in the world by land area?","a":"Russia","w":"Russia spans about 17 million square kilometers across Europe and Asia, covering 11 time zones. It is nearly twice the size of Canada, the next largest country.","c":"round-1","s":"History & Geography"},{"q":"What is the largest hot desert in the world?","a":"The Sahara","w":"The Sahara stretches across North Africa and is roughly the size of the United States. Only the cold deserts of Antarctica and the Arctic are bigger, which is why 'hot' matters in the question.","c":"round-1","s":"History & Geography"},{"q":"The Statue of Liberty was a gift to the United States from which country?","a":"France","w":"France gave the statue to celebrate friendship between the two nations, and it was dedicated in New York Harbor in 1886. Its iron skeleton was engineered by Gustave Eiffel, who later built his famous tower.","c":"round-1","s":"History & Geography"},{"q":"In which city would you find the ancient Colosseum?","a":"Rome","w":"Completed in 80 CE, the Colosseum could hold roughly 50,000 spectators for gladiator contests and public spectacles. It remains the largest ancient amphitheater ever built.","c":"round-1","s":"History & Geography"},{"q":"Which Italian tower is world-famous for leaning to one side?","a":"The Leaning Tower of Pisa","w":"The bell tower began tilting during construction in the 12th century because it was built on soft ground. Engineers stabilized it in the 1990s but deliberately kept a lean of about four degrees.","c":"round-1","s":"History & Geography"},{"q":"Which country is home to the Great Wall, a fortification stretching thousands of kilometers?","a":"China","w":"Built and rebuilt over many centuries to guard the northern frontier, the wall's branches total over 20,000 kilometers. Despite the popular myth, it is not visible to the naked eye from space.","c":"round-1","s":"History & Geography"},{"q":"In which Indian city does the Taj Mahal stand?","a":"Agra","w":"Emperor Shah Jahan built the white marble mausoleum in memory of his wife Mumtaz Mahal, with some 20,000 artisans working on it in the 17th century. It is now a UNESCO World Heritage Site.","c":"round-1","s":"History & Geography"},{"q":"The famous clock tower housing the bell known as Big Ben stands in which city?","a":"London","w":"Big Ben is technically the nickname of the 13.7-tonne Great Bell, not the tower itself. The tower at the Palace of Westminster was renamed Elizabeth Tower in 2012 for the Queen's Diamond Jubilee.","c":"round-1","s":"History & Geography"},{"q":"Niagara Falls sits on the border between Canada and which other country?","a":"The United States","w":"The falls straddle the border between Ontario and New York State. The largest of the three waterfalls, Horseshoe Falls, lies mostly on the Canadian side.","c":"round-1","s":"History & Geography"},{"q":"Which ancient civilization built the mountain citadel of Machu Picchu in Peru?","a":"The Inca","w":"Built in the 15th century about 2,430 meters up in the Andes, Machu Picchu was abandoned during the Spanish conquest and never found by the conquistadors. Hiram Bingham brought it to world attention in 1911.","c":"round-1","s":"History & Geography"},{"q":"Who was the first President of the United States?","a":"George Washington","w":"Washington took the first presidential oath in 1789 in New York City, then the temporary capital. He set the two-term tradition that later became law, and the permanent capital was named in his honor.","c":"round-1","s":"History & Geography"},{"q":"Which famous Egyptian queen was romantically linked with both Julius Caesar and Mark Antony?","a":"Cleopatra","w":"Cleopatra VII was the last active ruler of Egypt's Ptolemaic dynasty. Though she ruled Egypt, her family line was actually Greek, descended from one of Alexander the Great's generals.","c":"round-1","s":"History & Geography"},{"q":"Who painted the Mona Lisa?","a":"Leonardo da Vinci","w":"Leonardo began the portrait around 1503 and kept it with him until his death in France. It hangs in the Louvre in Paris, where its fame exploded after it was stolen in 1911 and recovered two years later.","c":"round-1","s":"History & Geography"},{"q":"What fruit is the main ingredient in guacamole?","a":"Avocado","w":"Guacamole comes from the Aztec dish ahuacamolli, meaning avocado sauce. Botanically, the avocado is a berry with a single giant seed.","c":"round-1","s":"Food & Drink"},{"q":"Which Italian city is considered the birthplace of pizza?","a":"Naples","w":"Neapolitan bakers were selling tomato-topped flatbreads long before pizza went global. Legend says the Margherita was created there in 1889, its tomato, mozzarella, and basil matching the colors of the Italian flag.","c":"round-1","s":"Food & Drink"},{"q":"What legume is the main ingredient in hummus?","a":"Chickpeas","w":"The word hummus is simply the Arabic word for chickpeas. The dip blends them with tahini, lemon, and garlic, and has been eaten across the Middle East for centuries.","c":"round-1","s":"Food & Drink"},{"q":"What food do thousands of people hurl at each other during Spain's annual La Tomatina festival?","a":"Tomatoes","w":"Held in the town of Bunol each August, La Tomatina turns the streets into a giant food fight using truckloads of overripe tomatoes. The tradition began with a spontaneous street brawl in 1945.","c":"round-1","s":"Food & Drink"},{"q":"Which country is the original home of sushi as we know it today?","a":"Japan","w":"Modern nigiri sushi, fresh fish pressed onto vinegared rice, was popularized as street food in 19th-century Edo, the city now called Tokyo. Sushi actually refers to the seasoned rice, not the raw fish.","c":"round-1","s":"Food & Drink"},{"q":"What sweet product is made by boiling down the sap of maple trees?","a":"Maple syrup","w":"It takes roughly 40 liters of sap to produce a single liter of syrup. Canada makes most of the world's supply, with the province of Quebec alone producing the large majority of it.","c":"round-1","s":"Food & Drink"},{"q":"Which food, sometimes found still edible in ancient Egyptian tombs, essentially never spoils?","a":"Honey","w":"Honey's low moisture and natural acidity make it nearly impossible for bacteria to grow in it. Archaeologists have opened tombs thousands of years old and found honey still preserved inside.","c":"round-1","s":"Food & Drink"},{"q":"Which fruit grows in bunches known as hands, with each individual fruit called a finger?","a":"Bananas","w":"A cluster of bananas is called a hand and each single banana is a finger. Botanically bananas are berries, and the plant they grow on is a giant herb rather than a tree.","c":"round-1","s":"Food & Drink"},{"q":"What is the strong Italian coffee made by forcing hot water through finely ground beans called?","a":"Espresso","w":"Espresso means 'pressed out' in Italian, and the brewing method was patented in Milan in the early 1900s. A single shot is the base for cappuccinos, lattes, and americanos.","c":"round-1","s":"Food & Drink"},{"q":"Which fruit tops a Hawaiian pizza along with ham?","a":"Pineapple","w":"Despite the name, Hawaiian pizza was invented in Canada in 1962 by Sam Panopoulos, a Greek-born restaurant owner in Ontario. He named it after the brand of canned pineapple he used.","c":"round-1","s":"Food & Drink"},{"q":"Wombats are the only animals known to produce droppings in what distinctive shape?","a":"Cubes","w":"The last stretch of a wombat's intestine has regions of differing stiffness that mould the drying waste into flat-sided cubes. The shape stops the droppings rolling off the rocks wombats use as scent markers.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"The joint that appears to be a flamingo's backward-bending knee is really which joint?","a":"Its ankle","w":"A flamingo's actual knee sits high up, hidden under its body feathers. What looks like a knee bending the wrong way is the ankle, and everything below it is effectively a very long foot.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Roughly how long can it take a sloth to digest a single meal of leaves?","a":"About two weeks","w":"Sloths have a multi-chambered stomach and an extremely slow metabolism, so leaves can sit in the gut for a fortnight. A full stomach can account for around a third of a sloth's body weight.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Neuroscientist Jaak Panksepp discovered that rats make a chirping sound when tickled. Why can humans not hear it?","a":"It is ultrasonic, around 50 kHz","w":"The chirps sit far above human hearing and need a bat detector to pick up. Rats that were tickled would chase the researcher's hand for more, and the ones that chirped most were the most eager to play.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Butterflies detect whether a leaf is worth laying eggs on using taste receptors located where?","a":"On their feet","w":"Chemoreceptors on a butterfly's tarsi let it taste a plant simply by standing on it. Females drum their feet on a leaf to release sap and confirm the species before committing eggs to it.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"What does a starfish use instead of a brain to coordinate its movement?","a":"A decentralised nerve ring and radial nerves","w":"Starfish have no brain and no blood. A nerve ring around the mouth feeds radial nerves down each arm, and the arms effectively negotiate with each other about which direction to travel.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Which large land mammal is physically incapable of jumping, because it can never get all four feet off the ground at once?","a":"The elephant","w":"Elephant leg bones are built as weight-bearing columns and they lack the springy tendon and calf muscle arrangement that launches other mammals. Even a charging elephant always keeps at least one foot down.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Which common domestic animal is anatomically unable to vomit?","a":"The horse","w":"A horse's lower oesophageal sphincter is unusually strong and meets the stomach at an angle that acts as a one-way valve. This is why colic is so dangerous in horses: what goes in cannot come back out.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"In the ostrich, which is larger: one of its eyes or its brain?","a":"The eye","w":"An ostrich eye is about 5 cm across, the largest of any land animal, and outweighs the bird's brain. The trade-off buys superb long-distance vision across open savannah.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"What colour is a giraffe's tongue, and why?","a":"Dark purple or blue-black","w":"The tongue reaches about 45 to 50 cm and spends the day exposed while stripping leaves from thorny branches. The heavy dark pigment is thought to work like built-in sunscreen.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Which taste can cats not detect at all, because the gene for its receptor is broken in the entire cat family?","a":"Sweetness","w":"All cats carry a defective version of the Tas1r2 gene needed for the sweet receptor. As obligate carnivores they had no use for detecting sugars, so the sense was simply lost.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Some desert snails can survive without food or water for how long by sealing themselves inside their shells?","a":"Up to about three years","w":"The snail seals its opening with a dried mucus plug called an epiphragm and drops into estivation. Museum specimens have famously revived after being glued to display cards for years.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Hummingbirds are among the most agile fliers alive, but what everyday movement can they barely manage?","a":"Walking","w":"Their feet are tiny and weak, evolved for perching rather than locomotion, so a hummingbird can only shuffle sideways along a branch. It will fly a few centimetres rather than walk them.","c":"round-2","s":"Ridiculous Animal Facts"},{"q":"Honey found sealed in ancient Egyptian tombs was still edible after thousands of years. What makes honey essentially immortal?","a":"Very low water content and high acidity","w":"Bees dehydrate nectar until there is too little free water for microbes to grow, and honey is naturally acidic with traces of hydrogen peroxide. Sealed from moisture, it simply never spoils.","c":"round-2","s":"Food and Drink"},{"q":"Botanically speaking, which of these is a true berry: a banana or a strawberry?","a":"The banana","w":"A berry must develop from a single ovary with seeds inside, which bananas do. A strawberry is an aggregate accessory fruit, and each tiny speck on its surface is technically a separate fruit.","c":"round-2","s":"Food and Drink"},{"q":"Peanuts are not nuts. What family of plants do they actually belong to?","a":"Legumes, the same family as peas and beans","w":"Peanuts grow in pods underground rather than on trees, which is why they are sometimes called groundnuts. Botanically they sit beside lentils and soybeans, not almonds and walnuts.","c":"round-2","s":"Food and Drink"},{"q":"Before Dutch growers cultivated the familiar orange variety, what colour were most cultivated carrots?","a":"Purple, along with white and yellow","w":"Early cultivated carrots from Central Asia were mostly purple or yellow. Orange varieties were selectively bred in the Netherlands from the 16th century onward and gradually took over the market.","c":"round-2","s":"Food and Drink"},{"q":"In the 1830s an American doctor sold tomato-based pills promising to cure indigestion and diarrhoea. What condiment grew out of that fad?","a":"Ketchup","w":"Dr John Cook Bennett promoted tomatoes as medicine and his tomato pills were widely advertised before the craze collapsed amid fraud claims. The tomato-based sauce, however, stuck around.","c":"round-2","s":"Food and Drink"},{"q":"Which common baking spice is genuinely toxic and mildly hallucinogenic if eaten in large quantities?","a":"Nutmeg","w":"Nutmeg contains myristicin, which in doses of a couple of whole nuts can cause hallucinations, nausea and a hangover that lasts for days. Sprinkled on custard it is entirely harmless.","c":"round-2","s":"Food and Drink"},{"q":"The shortest war in recorded history, fought in 1896 between Britain and Zanzibar, lasted roughly how long?","a":"About 38 to 45 minutes","w":"British warships opened fire at 9:02 am and the Zanzibari flag came down before 9:45. The sultan's palace was reduced to rubble and the whole conflict was over before mid-morning.","c":"round-2","s":"Historical Absurdities"},{"q":"Teaching at the University of Oxford began around 1096. Which empire, founded in 1325, is therefore younger than Oxford?","a":"The Aztec Empire","w":"Oxford was already teaching students for over two centuries before Tenochtitlan was founded in 1325. By the time the Aztec Triple Alliance formed in 1428, Oxford had multiple established colleges.","c":"round-2","s":"Historical Absurdities"},{"q":"Cleopatra lived closer in time to the Moon landing than to the construction of which monument?","a":"The Great Pyramid of Giza","w":"The Great Pyramid was finished around 2560 BC, roughly 2,500 years before Cleopatra. The Apollo 11 landing came about 2,000 years after her, making her our comparative contemporary.","c":"round-2","s":"Historical Absurdities"},{"q":"Woolly mammoths were still alive on Wrangel Island when which Egyptian monument was already standing?","a":"The Great Pyramid of Giza","w":"An isolated mammoth population survived on Wrangel Island in the Arctic until roughly 1650 BC, some 900 years after the Great Pyramid was completed.","c":"round-2","s":"Historical Absurdities"},{"q":"Which was invented first: the fax machine or the telephone?","a":"The fax machine","w":"Alexander Bain patented a device for transmitting images over wires in 1843, more than three decades before Alexander Graham Bell patented the telephone in 1876.","c":"round-2","s":"Historical Absurdities"},{"q":"Nintendo was founded in 1889. What did the company originally make?","a":"Handmade playing cards","w":"Fusajiro Yamauchi began producing hanafuda cards in Kyoto. Nintendo also tried instant rice, taxis and a chain of love hotels before settling on electronic games in the 1970s.","c":"round-2","s":"Historical Absurdities"},{"q":"Harvard University was founded in 1636. Which branch of mathematics did not yet exist when it opened?","a":"Calculus","w":"Newton and Leibniz developed calculus independently in the 1660s and 1670s, decades after Harvard began teaching. The university predates it by roughly a generation.","c":"round-2","s":"Historical Absurdities"},{"q":"France carried out its last execution by guillotine in 1977, the same year which science fiction film premiered?","a":"Star Wars","w":"Hamida Djandoubi was guillotined at Marseille in September 1977, four months after Star Wars opened in American cinemas. France abolished the death penalty in 1981.","c":"round-2","s":"Historical Absurdities"},{"q":"Actress Betty White was born in January 1922. Which everyday convenience was invented after she was born?","a":"Sliced bread","w":"Otto Rohwedder's bread-slicing machine went into commercial use in 1928, when White was six. She genuinely predated the thing that all other things are measured against.","c":"round-2","s":"Historical Absurdities"},{"q":"The Eiffel Tower is measurably taller in summer than in winter. By roughly how much?","a":"About 15 centimetres","w":"Iron expands as it heats, so the tower grows by roughly 15 cm on hot days and leans very slightly away from the sun as the sunlit side expands more than the shaded side.","c":"round-2","s":"Places and Nations"},{"q":"What is the national animal of Scotland?","a":"The unicorn","w":"The unicorn has appeared in Scottish heraldry since the 12th century and features on the royal coat of arms. In legend it was the natural enemy of the lion, England's emblem.","c":"round-2","s":"Places and Nations"},{"q":"Which country has essentially no mosquitoes, despite plenty of standing water and a chilly, damp climate?","a":"Iceland","w":"Iceland's freeze-and-thaw cycles interrupt the mosquito life cycle at the wrong moments, and no species has managed to establish itself. Neighbouring Greenland is thick with them.","c":"round-2","s":"Places and Nations"},{"q":"Australia is wider from east to west than which astronomical body is across?","a":"The Moon","w":"Australia spans roughly 4,000 km at its widest, while the Moon's diameter is about 3,475 km. The comparison holds only for width, since the Moon's surface area is far greater.","c":"round-2","s":"Places and Nations"},{"q":"How many time zones does Russia span?","a":"Eleven","w":"Russia stretches across eleven time zones from Kaliningrad in the west to Kamchatka in the east. When Moscow is having breakfast, the far east of the country is already into the evening.","c":"round-2","s":"Places and Nations"},{"q":"What is the proper name for the dot above a lowercase letter i or j?","a":"A tittle","w":"The word comes from the Latin titulus, meaning a small mark. It survives in the phrase 'to a T' and in the biblical expression 'jot and tittle', meaning the very smallest detail.","c":"round-2","s":"Words and Names"},{"q":"What is the name for the plastic or metal sleeve on the end of a shoelace?","a":"An aglet","w":"The aglet stops the lace fraying and stiffens the tip enough to thread it through eyelets. The word comes from the French aiguillette, meaning a little needle.","c":"round-2","s":"Words and Names"},{"q":"What is the anatomical name for the smooth patch of skin between your eyebrows?","a":"The glabella","w":"The word comes from the Latin glaber, meaning smooth or hairless. Doctors sometimes pinch it to check for dehydration by seeing how quickly the skin springs back.","c":"round-2","s":"Words and Names"},{"q":"Which symbol was once recited at the end of the English alphabet, effectively as a 27th letter?","a":"The ampersand","w":"Schoolchildren finished the alphabet with 'and per se and', meaning 'and, by itself, and'. Said quickly and often enough, that phrase slurred into the word ampersand.","c":"round-2","s":"Words and Names"},{"q":"Which word, appropriately enough, is the longest common English word typable using only the top row of a QWERTY keyboard?","a":"Typewriter","w":"Every letter in typewriter sits on the QWERTY top row. The layout was designed for mechanical typebars, and the coincidence has been a salesman's party trick for over a century.","c":"round-2","s":"Words and Names"},{"q":"Which letter of the alphabet does not appear in the name of any US state?","a":"Q","w":"Every other letter turns up somewhere, with Z surviving only in Arizona and X only in Texas and New Mexico. Q appears in plenty of city names but never in a state's.","c":"round-2","s":"Words and Names"},{"q":"How many letters are in the Hawaiian alphabet?","a":"Thirteen","w":"Five vowels and eight consonants, including the okina glottal stop. Missionaries devised the written form in the 1820s and trimmed it to the sounds the language actually uses.","c":"round-2","s":"Words and Names"},{"q":"What familiar facial feature is missing from Leonardo's Mona Lisa?","a":"Eyebrows","w":"The sitter has no visible eyebrows or eyelashes. Scans suggest Leonardo painted at least a left eyebrow and that centuries of cleaning and restoration gradually removed it.","c":"round-2","s":"Art and Science Absurdities"},{"q":"Marie Curie's laboratory notebooks are still kept in lead-lined boxes. Why?","a":"They remain dangerously radioactive","w":"Her papers are contaminated with radium 226, which has a half-life of about 1,600 years. Researchers must sign a liability waiver and wear protective gear to consult them.","c":"round-2","s":"Art and Science Absurdities"},{"q":"A French newspaper mistakenly published Alfred Nobel's obituary in 1888, calling him the 'merchant of death'. What did he reportedly do in response?","a":"He rewrote his will to endow the Nobel Prizes","w":"The paper had confused him with his late brother Ludvig. Reading his own condemnation while alive is widely credited with prompting Nobel to leave his fortune to the prizes.","c":"round-2","s":"Art and Science Absurdities"},{"q":"Ancient Romans used a surprising substance as a mouthwash and tooth whitener. What was it?","a":"Urine","w":"Stale urine breaks down into ammonia, a genuinely effective cleaning agent. Portuguese urine was considered the finest grade, and the emperor Vespasian taxed the urine trade.","c":"round-2","s":"Art and Science Absurdities"},{"q":"There is no archaeological evidence that Viking warriors ever wore what famous item of headgear?","a":"Horned helmets","w":"No horned helmet has ever been recovered from a Viking grave. The image was largely invented by 19th century Romantic artists and costume designers for Wagner's operas.","c":"round-2","s":"Historical Absurdities"},{"q":"Napoleon Bonaparte's reputation for being short comes largely from a measurement mix-up. What was the confusion?","a":"French inches were longer than English inches","w":"Recorded at 5 feet 2 inches in pre-metric French units, he was roughly 5 foot 7 in English measure, about average for his time. British caricaturists happily did the rest.","c":"round-2","s":"Historical Absurdities"},{"q":"The earliest chainsaws were developed in the late 1700s for use in which field?","a":"Medicine, for childbirth surgery","w":"Scottish doctors John Aitken and James Jeffray devised a hand-cranked chain saw to cut through the pelvis during difficult deliveries. Forestry adopted the design more than a century later.","c":"round-2","s":"Accidental Inventions"},{"q":"Bubble wrap was originally marketed as what product before anyone thought of using it for packaging?","a":"Textured wallpaper","w":"Alfred Fielding and Marc Chavannes sealed two shower curtains together in 1957 and tried selling it as wallpaper, then greenhouse insulation. IBM made it a packing material in 1960.","c":"round-2","s":"Accidental Inventions"},{"q":"Play-Doh was originally sold for what completely different household purpose?","a":"Cleaning coal soot off wallpaper","w":"Kutol's putty was rolled over wallpaper to lift soot from coal heating. As homes switched to gas the business collapsed, until a teacher relative suggested selling it to schools as modelling clay.","c":"round-2","s":"Accidental Inventions"},{"q":"The tissues we know as Kleenex were originally manufactured during the First World War for what use?","a":"Gas mask filters","w":"Kimberly-Clark developed the crepe paper as a cotton substitute for filters and bandages. After the war the surplus was repackaged as a cold cream remover, then as disposable handkerchiefs.","c":"round-2","s":"Accidental Inventions"},{"q":"The Slinky was invented by accident while a naval engineer was developing springs for what purpose?","a":"Stabilising sensitive instruments on ships","w":"Richard James knocked a tension spring off a shelf in 1943 and watched it walk itself down. His wife Betty found the name in a dictionary and the toy sold out its first 400 units in 90 minutes.","c":"round-2","s":"Accidental Inventions"},{"q":"The name WD-40 is an abbreviation of what?","a":"Water Displacement, 40th formula","w":"Rocket Chemical Company was trying to prevent corrosion on the Atlas missile. The name records that the successful mixture was the fortieth attempt, and the label was never changed.","c":"round-2","s":"Accidental Inventions"},{"q":"Engineer Percy Spencer discovered the principle of the microwave oven in 1945 when what happened in his pocket?","a":"A chocolate bar melted","w":"Spencer was standing near an active magnetron at Raytheon when the sweet in his pocket softened. He tried popcorn next, then an egg, which exploded over a colleague.","c":"round-2","s":"Accidental Inventions"},{"q":"The Post-it Note exists because a 3M scientist failed at what task?","a":"Making a very strong adhesive","w":"Spencer Silver produced a weak, reusable glue in 1968 with no obvious use. Colin Fry, a colleague who kept losing his place in his hymn book, suggested sticking it to paper bookmarks.","c":"round-2","s":"Accidental Inventions"},{"q":"Super Glue was discovered by accident while researchers were trying to develop what?","a":"Clear plastic gun sights","w":"Harry Coover found cyanoacrylate stuck to everything it touched and rejected it as useless in 1942. He revisited it years later while working on heat-resistant aircraft canopies.","c":"round-2","s":"Accidental Inventions"},{"q":"The Frisbee takes its name from a company that originally sold what?","a":"Pies","w":"Students in Connecticut threw empty tins from the Frisbie Pie Company. When Wham-O bought the rights to a plastic flying disc, it adopted the students' name with a changed spelling.","c":"round-2","s":"Accidental Inventions"},{"q":"In 1947 computing pioneer Grace Hopper's team taped a physical object into a logbook beside the note 'first actual case of bug being found'. What was it?","a":"A moth","w":"The moth had jammed a relay in the Harvard Mark II. The word bug already meant a technical fault, but the logbook page made the pun literal and it now sits in the Smithsonian.","c":"round-2","s":"Accidental Inventions"},{"q":"Monopoly is descended from a 1904 board game designed to demonstrate the evils of landlordism. Who created it?","a":"Lizzie Magie","w":"Magie patented The Landlord's Game to promote Georgist land-value tax ideas. Decades later Charles Darrow sold a reworked version to Parker Brothers, which bought Magie's patent for 500 dollars.","c":"round-2","s":"Words and Names"},{"q":"The term jaywalking comes from an early 20th century American slang word. What did 'jay' mean at the time?","a":"A rube or country bumpkin","w":"A jay was an unsophisticated newcomer who did not know how to behave in a city. Motoring groups popularised the insult in the 1920s to shift blame for collisions onto pedestrians.","c":"round-2","s":"Words and Names"},{"q":"The snapping shrimp stuns prey not with its claw but with what the claw creates. What is it?","a":"A collapsing cavitation bubble","w":"The claw shuts so fast it leaves a vacuum bubble in the water. When the bubble implodes it produces a shockwave, a flash of light, and momentary temperatures of thousands of degrees.","c":"round-3","s":"Bizarre Biology"},{"q":"The mantis shrimp's club accelerates so violently that its strike is followed by a second blow. What delivers it?","a":"The collapse of a cavitation bubble","w":"Even if the club misses, the imploding bubble it leaves behind hits with enough force to stun prey. The strike reaches accelerations comparable to a small-calibre bullet.","c":"round-3","s":"Bizarre Biology"},{"q":"The bombardier beetle sprays attackers with a chemical mixture at roughly what temperature?","a":"About 100 degrees Celsius, the boiling point of water","w":"It stores hydroquinone and hydrogen peroxide separately, then combines them with enzymes in a reaction chamber. The explosive reaction fires a scalding, pulsed jet with an audible pop.","c":"round-3","s":"Bizarre Biology"},{"q":"A single hagfish can turn a bucket of seawater into thick gel in seconds. What does it release to do this?","a":"Slime threads that expand on contact with water","w":"Tiny packets of coiled protein fibres unspool into a fibrous network thousands of times their original volume. The slime clogs the gills of attacking predators, which is why sharks back off.","c":"round-3","s":"Bizarre Biology"},{"q":"Which mammal is effectively cold-blooded, feels no pain from acid, and can survive about 18 minutes with no oxygen at all?","a":"The naked mole rat","w":"It cannot regulate its own body temperature and switches to fructose-based metabolism when oxygen runs out, like a plant. It also shows remarkable resistance to cancer.","c":"round-3","s":"Bizarre Biology"},{"q":"The wood frog survives Alaskan winters by doing what to itself?","a":"Freezing solid","w":"Up to two thirds of its body water turns to ice, its heart stops and its brain activity ceases. Glucose and urea act as antifreeze inside the cells, and the frog thaws and hops away in spring.","c":"round-3","s":"Bizarre Biology"},{"q":"Antarctic icefish are the only known vertebrates with what missing from their blood?","a":"Haemoglobin, so their blood is nearly colourless","w":"In water near minus 2 degrees Celsius, oxygen dissolves so readily that these fish get by with plain plasma, huge hearts and antifreeze proteins. Their blood runs clear or faintly yellow.","c":"round-3","s":"Bizarre Biology"},{"q":"The tiny parasite Cymothoa exigua does something no other known animal does: it replaces which body part of its host?","a":"The tongue","w":"The isopod severs the blood supply to a fish's tongue, the tongue withers, and the parasite attaches in its place. The fish then uses the parasite's body as a functioning tongue.","c":"round-3","s":"Bizarre Biology"},{"q":"The parasitic hairworm manipulates its cricket host into performing what fatal act?","a":"Jumping into water and drowning","w":"The worm grows inside the cricket, then releases proteins that disrupt the insect's nervous system so it seeks out water. The adult worm bursts out to breed once the cricket is submerged.","c":"round-3","s":"Bizarre Biology"},{"q":"The jewel wasp Ampulex compressa disables a cockroach not by paralysing it but by doing what?","a":"Injecting venom into its brain to remove its escape reflex","w":"A precise sting to the head leaves the roach able to walk but unwilling to flee. The wasp then leads it by the antenna into a burrow, where its larva feeds on the living, docile host.","c":"round-3","s":"Bizarre Biology"},{"q":"Cicadas of the genus Magicicada emerge in cycles of 13 and 17 years. Why are those numbers thought to be significant?","a":"They are prime numbers","w":"Prime cycles rarely coincide with the shorter cycles of predators or parasites, so a species that emerges every 17 years is hard to track. The two broods overlap only once every 221 years.","c":"round-3","s":"Bizarre Biology"},{"q":"A honeybee returning to the hive performs a figure-eight movement to communicate what to the other bees?","a":"The direction and distance of a food source","w":"The angle of the waggle run relative to vertical encodes the flower's bearing from the sun, and the length of the run encodes the distance. Karl von Frisch won a Nobel Prize for decoding it.","c":"round-3","s":"Bizarre Biology"},{"q":"Leafcutter ants do not eat the leaves they carry. What do they actually do with them?","a":"Feed a fungus that they farm and eat","w":"The colony cultivates a single fungus species on a compost of chewed leaves, weeds out competing moulds, and even carries antibiotic-producing bacteria on its bodies to protect the crop.","c":"round-3","s":"Bizarre Biology"},{"q":"The Portuguese man o' war looks like a jellyfish but is not a single animal. What is it?","a":"A colony of specialised organisms called zooids","w":"It is a siphonophore: separate genetically identical individuals handle floating, hunting, digesting and reproducing. None can survive alone, so the colony functions as one animal.","c":"round-3","s":"Bizarre Biology"},{"q":"Radiocarbon and eye-lens dating suggest the Greenland shark can live for roughly how long?","a":"At least 250 years, possibly much longer","w":"Dating of eye lens proteins put one female at an estimated 392 years, give or take a wide margin. The species is thought not to reach sexual maturity until about 150 years old.","c":"round-3","s":"Bizarre Biology"},{"q":"In 2006 researchers accidentally killed an ocean quahog clam nicknamed Ming while determining its age. How old was it?","a":"507 years","w":"Growth rings in its shell showed it began life around 1499, during the Ming dynasty. It was opened for study before anyone realised it was the oldest individual animal ever recorded.","c":"round-3","s":"Bizarre Biology"},{"q":"A Great Basin bristlecone pine named Methuselah, in California's White Mountains, is roughly how old?","a":"About 4,800 years","w":"It germinated before the Great Pyramid was built. Its precise location is kept secret to protect it, and the species survives by growing extremely slowly in harsh, dry conditions.","c":"round-3","s":"Bizarre Biology"},{"q":"Pando, a forest in Utah covering over 40 hectares, is remarkable because all of its roughly 47,000 aspen trunks are what?","a":"A single organism sharing one root system","w":"Every trunk is a genetically identical clone connected underground. Estimated at thousands of years old and weighing around 6,000 tonnes, Pando is among the heaviest known organisms.","c":"round-3","s":"Bizarre Biology"},{"q":"The largest known organism by area is a specimen of Armillaria ostoyae in Oregon. What kind of organism is it?","a":"A fungus, the honey fungus","w":"Its network of underground filaments spreads across roughly 9 square kilometres of the Malheur National Forest. Genetic testing confirmed the whole sprawl is one individual.","c":"round-3","s":"Bizarre Biology"},{"q":"The Welwitschia plant of the Namib Desert grows only two leaves in its entire life. How long can those leaves last?","a":"Over a thousand years","w":"The pair of leaves never stop growing, splitting and fraying into what looks like a tangled heap. Some plants are estimated to be well over 1,000 years old.","c":"round-3","s":"Bizarre Biology"},{"q":"Rafflesia arnoldii produces the largest single flower in the world, up to a metre across. What does it smell of?","a":"Rotting flesh","w":"The stench attracts carrion flies to pollinate it. The plant has no leaves, stems or roots of its own and lives as a parasite entirely inside a vine until it flowers.","c":"round-3","s":"Bizarre Biology"},{"q":"Monotropa uniflora, the ghost plant, is white rather than green because it lacks what?","a":"Chlorophyll","w":"Unable to photosynthesise, it taps into fungal networks in the forest floor and steals sugars that the fungi obtained from tree roots. It can grow in deep shade where nothing else will.","c":"round-3","s":"Bizarre Biology"},{"q":"At the triple point of water, the substance does something impossible at normal pressures. What?","a":"Boils and freezes at the same time","w":"At 0.01 degrees Celsius and about 0.006 atmospheres, ice, liquid water and vapour coexist in equilibrium. Water in a flask at that point visibly bubbles while ice crystals form in it.","c":"round-3","s":"Counterintuitive Science"},{"q":"Cooled below about 2.17 kelvin, liquid helium becomes a superfluid and does what to its container?","a":"Climbs the walls and escapes over the rim","w":"With effectively zero viscosity, it creeps up as a thin film and flows out of any open vessel. It also conducts heat so efficiently that it stops bubbling entirely.","c":"round-3","s":"Counterintuitive Science"},{"q":"Very pure water can be cooled well below zero and stay liquid. What happens the instant you disturb it?","a":"It freezes almost immediately","w":"Freezing needs a nucleation site, and ultra-pure water in a smooth container has none. A tap or a single ice crystal triggers a chain reaction that turns the bottle to slush in seconds.","c":"round-3","s":"Counterintuitive Science"},{"q":"Heated to around 900 degrees Celsius in oxygen, a diamond will do what?","a":"Burn away completely, leaving no ash","w":"Diamond is pure carbon, so it combusts into carbon dioxide gas. Antoine Lavoisier demonstrated this in the 1770s by burning a diamond with focused sunlight.","c":"round-3","s":"Counterintuitive Science"},{"q":"Which metal will melt in the palm of your hand, with a melting point of about 30 degrees Celsius?","a":"Gallium","w":"A solid gallium spoon turns to liquid in a hot drink, a favourite chemistry party trick. Unlike mercury it is not acutely toxic, though it aggressively attacks aluminium.","c":"round-3","s":"Counterintuitive Science"},{"q":"Old window panes are often thicker at the bottom. Contrary to popular belief, why is this not evidence that glass flows?","a":"It is a result of how the glass was originally made","w":"Crown glass was spun into discs of uneven thickness and glaziers usually set the heavy edge downward. Glass is an amorphous solid; at room temperature it would take longer than the age of the universe to visibly flow.","c":"round-3","s":"Counterintuitive Science"},{"q":"A lightning channel reaches a temperature roughly how many times hotter than the surface of the Sun?","a":"About five times hotter","w":"Lightning can hit around 30,000 kelvin, while the Sun's visible surface sits near 5,800 kelvin. The sudden expansion of that superheated air is what we hear as thunder.","c":"round-3","s":"Counterintuitive Science"},{"q":"On Venus, which lasts longer: a day or a year?","a":"A day","w":"Venus takes about 243 Earth days to turn once on its axis but only 225 to orbit the Sun. A single Venusian day is therefore longer than its entire year.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"Venus is unusual among the planets because it rotates in which direction?","a":"Backwards, opposite to almost every other planet","w":"Seen from above the solar system's north, Venus turns clockwise while the others turn anticlockwise. On its surface, the Sun would rise in the west and set in the east.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"Uranus is tilted so extremely that it effectively does what as it orbits the Sun?","a":"Rolls on its side","w":"Its axial tilt is about 98 degrees, probably the result of an ancient collision. Each pole spends roughly 42 Earth years in continuous sunlight, then 42 in darkness.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"Saturn has a mean density lower than water. What is the often-cited consequence?","a":"It would float in a sufficiently large ocean","w":"Its density is about 0.69 grams per cubic centimetre, mostly hydrogen and helium. The image is a thought experiment, since no ocean could exist at that scale and the planet has no solid surface.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"Olympus Mons on Mars stands roughly two and a half times the height of Mount Everest. Why could nothing that tall form on Earth?","a":"Plate tectonics moves crust away from hotspots","w":"Mars has no moving plates, so a volcano sits over its magma source and grows for hundreds of millions of years. Earth's drifting plates spread the same output into island chains like Hawaii.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"A teaspoon of neutron star material would weigh approximately how much on Earth?","a":"Around a billion tonnes","w":"Neutron stars pack more than the Sun's mass into a sphere about 20 km across, with atoms crushed until nuclei touch. The same density as an entire mountain range in a sugar cube.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"Analogue televisions tuned to a dead channel picked up a faint signal from the beginning of the universe. What was it?","a":"The cosmic microwave background","w":"A small percentage of that static was radiation released about 380,000 years after the Big Bang. Penzias and Wilson found it in 1964 while trying to eliminate noise from a radio antenna.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"The Moon is slowly moving away from Earth. At roughly what rate?","a":"About 3.8 centimetres per year","w":"Tidal friction transfers Earth's rotational energy to the Moon's orbit, so our days lengthen as it retreats. Laser reflectors left by Apollo astronauts let us measure the distance precisely.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"Earth's inner core is thought to be roughly as hot as which familiar object?","a":"The surface of the Sun","w":"Estimates put the inner core near 5,200 degrees Celsius, comparable to the Sun's photosphere. Immense pressure keeps that iron solid rather than molten.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"What proportion of the total mass of the solar system is the Sun?","a":"About 99.86 percent","w":"Everything else, all eight planets, moons, asteroids and comets, shares the remaining fraction. Jupiter alone accounts for most of that leftover.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"How long does sunlight take to travel from the Sun to Earth?","a":"About 8 minutes and 20 seconds","w":"Light covers the roughly 150 million km at about 300,000 km per second. If the Sun vanished, we would carry on seeing and orbiting it for over eight minutes.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"The fastest known millisecond pulsars spin on their axis at what sort of rate?","a":"Several hundred times per second","w":"PSR J1748-2446ad turns about 716 times a second, so its equator moves at nearly a quarter of light speed. The beam sweeps past Earth like an extraordinarily precise lighthouse.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"Laboratory experiments support the idea that deep inside Uranus and Neptune it literally rains what?","a":"Diamonds","w":"Immense pressure splits methane and compresses the carbon into diamond, which then sinks toward the core. Researchers have reproduced the effect by shocking plastic with powerful lasers.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"The Bootes void is a region of space about 330 million light years across that is notable for containing what?","a":"Almost no galaxies","w":"It holds only a few dozen galaxies where hundreds of thousands would be expected. As astronomer Greg Aldering put it, if the Milky Way had been in the void we would not have known other galaxies existed until the 1960s.","c":"round-3","s":"Cosmic and Physics Oddities"},{"q":"Under the Antarctic sea ice, a descending plume of supercooled brine can form a structure nicknamed the finger of death. What is its scientific name?","a":"A brinicle","w":"Salty water rejected by freezing sea ice sinks and freezes the fresher water around it into a growing tube. When the brinicle reaches the seabed it can freeze starfish and urchins in place.","c":"round-3","s":"Strange Places"},{"q":"Blood Falls in Antarctica pours a vivid red flow onto the Taylor Glacier. What causes the colour?","a":"Iron-rich brine oxidising as it reaches the air","w":"The source is a subglacial lake sealed off for over a million years, hosting microbes that survive without light or oxygen. The iron in the brine rusts on contact with air.","c":"round-3","s":"Strange Places"},{"q":"The Shanay-timpishka in Peru is remarkable among rivers for what property?","a":"Its water is near boiling","w":"A stretch of the river runs at up to about 94 degrees Celsius, hot enough to kill any animal that falls in. It is heated by geothermal water rising along a fault, not by nearby volcanoes.","c":"round-3","s":"Strange Places"},{"q":"Lake Nyos in Cameroon killed around 1,700 people in 1986 without any eruption, flood or fire. What happened?","a":"It released a huge cloud of carbon dioxide","w":"Volcanic CO2 had accumulated in the deep water until the lake overturned and belched it out. The dense gas flowed downhill and suffocated everything in the valleys below.","c":"round-3","s":"Strange Places"},{"q":"The Darvaza gas crater in Turkmenistan, known as the Door to Hell, has been alight since which decade?","a":"The 1970s","w":"A drilling rig is said to have collapsed into a methane cavern and the gas was set alight to burn off safely. It has been burning ever since, a fiery pit roughly 70 metres across in the desert.","c":"round-3","s":"Strange Places"},{"q":"Where the Catatumbo River meets Lake Maracaibo in Venezuela, what natural phenomenon occurs on up to 300 nights a year?","a":"Near-continuous lightning storms","w":"Warm air from the lake meets cold air off the Andes almost every night, producing hours of near-constant lightning. Sailors historically used the glow as a navigation aid.","c":"round-3","s":"Strange Places"},{"q":"The sailing stones of Death Valley leave long trails across a dry lake bed. What finally explained their movement when it was filmed in 2014?","a":"Thin floating ice sheets pushed by light wind","w":"A shallow winter pond freezes, then breaks into panes at dawn that a breeze nudges along, shoving the rocks and scoring the mud. No one had seen it happen until time-lapse cameras caught it.","c":"round-3","s":"Strange Places"},{"q":"The grasslands of Namibia are dotted with barren circular patches metres across, known as what?","a":"Fairy circles","w":"Competing explanations involve termite activity and plants self-organising to share scarce water. The circles appear, persist for decades and then vanish, and the debate is still unresolved.","c":"round-3","s":"Strange Places"},{"q":"When a whale carcass sinks to the deep sea floor, the ecosystem that develops on it can last for how long?","a":"Decades","w":"A whale fall supports scavengers, then bone-eating worms and finally bacterial mats that live off chemicals in the skeleton. Some species are known from nowhere else.","c":"round-3","s":"Strange Places"},{"q":"In several bays around the world, disturbing the water at night makes it glow blue. What causes it?","a":"Bioluminescent dinoflagellates","w":"Single-celled plankton flash when jostled, probably to startle predators or attract larger animals that eat them. Puerto Rico's Mosquito Bay is among the brightest examples on Earth.","c":"round-3","s":"Strange Places"},{"q":"The 1494 Treaty of Tordesillas divided newly encountered lands outside Europe between which two powers?","a":"Spain and Portugal","w":"A meridian line was drawn west of the Cape Verde islands, with everything east going to Portugal. This is why Brazil, which juts east of the line, speaks Portuguese while the rest of South America speaks Spanish.","c":"round-4","s":"Deep-Cut History"},{"q":"The Western Schism, which began in 1378, reached the point where the Catholic Church simultaneously had how many men claiming to be pope?","a":"Three","w":"Rival claimants sat in Rome, Avignon and Pisa. The Council of Constance resolved it between 1414 and 1418 by deposing two, accepting the resignation of the third, and electing Martin V.","c":"round-4","s":"Deep-Cut History"},{"q":"The 1815 eruption of Mount Tambora in Indonesia caused 1816 to be known across Europe and North America as what?","a":"The Year Without a Summer","w":"Volcanic ash cooled the northern hemisphere, ruining harvests and bringing June snow to New England. Trapped indoors by the miserable weather at Lake Geneva, Mary Shelley began writing Frankenstein.","c":"round-4","s":"Deep-Cut History"},{"q":"The 1883 eruption of Krakatoa produced a sound documented as audible how far away?","a":"About 4,800 km, as far as Rodrigues island near Mauritius","w":"It is the loudest sound in modern recorded history. Barometers around the world registered the pressure wave circling the globe several times over the following days.","c":"round-4","s":"Deep-Cut History"},{"q":"In January 1919 a wave of what substance, moving at around 55 km per hour, killed 21 people in Boston's North End?","a":"Molasses","w":"A storage tank holding some 8.7 million litres burst, sending a two-storey wall of syrup through the streets. The disaster led to significantly tighter engineering and permit standards.","c":"round-4","s":"Deep-Cut History"},{"q":"In October 1814 a vat rupture at a London brewery released a flood of what into the streets of St Giles?","a":"Beer, over a million litres of porter","w":"The wave demolished houses and killed eight people. The brewery was taken to court and the disaster was ruled an act of God, so no one was held responsible.","c":"round-4","s":"Deep-Cut History"},{"q":"The largest accidental man-made explosion before the atomic age occurred in 1917 in which Canadian harbour?","a":"Halifax, Nova Scotia","w":"A French cargo ship packed with wartime explosives collided with a Norwegian vessel and detonated, killing about 1,800 people. The blast flattened much of the city's north end.","c":"round-4","s":"Deep-Cut History"},{"q":"In June 1908 an explosion over Siberia flattened around 80 million trees across 2,000 square kilometres. What is this event called?","a":"The Tunguska event","w":"It is generally attributed to a meteoroid or comet fragment exploding in the atmosphere. The region was so remote that no scientific expedition reached the site until 1927.","c":"round-4","s":"Deep-Cut History"},{"q":"The most intense geomagnetic storm on record, in 1859, is named after the British astronomer who observed the solar flare that caused it. What is it called?","a":"The Carrington Event","w":"Telegraph systems failed, some operators received shocks, and a few lines carried messages with their batteries disconnected. Aurorae were seen as far south as the Caribbean.","c":"round-4","s":"Deep-Cut History"},{"q":"At the Cadaver Synod of 897, Pope Stephen VI put a predecessor on trial in an unprecedented way. What was unusual about the defendant?","a":"He had been dead for months and his corpse was exhumed for the trial","w":"The body of Pope Formosus was dressed in vestments and propped on a throne while a deacon answered for it. He was found guilty, stripped and thrown into the Tiber.","c":"round-4","s":"Deep-Cut History"},{"q":"The Hundred Years War between England and France actually lasted how long?","a":"116 years, from 1337 to 1453","w":"The name was applied by later historians to a long series of separate campaigns broken by truces. Neither side would have recognised it as a single continuous war.","c":"round-4","s":"Deep-Cut History"},{"q":"Which writer quipped that the Holy Roman Empire was 'neither holy, nor Roman, nor an empire'?","a":"Voltaire","w":"He made the remark in his 1756 Essay on Customs. By then the empire was a loose patchwork of hundreds of German states, and Napoleon dissolved it fifty years later.","c":"round-4","s":"Deep-Cut History"},{"q":"During the Dutch tulip mania that peaked in 1637, the most sought-after bulbs owed their prized flame-streaked petals to what?","a":"A virus infecting the bulbs","w":"The tulip breaking virus produced the dramatic patterns collectors paid fortunes for, while weakening the plant. Nobody understood the cause until the 20th century.","c":"round-4","s":"Deep-Cut History"},{"q":"Isaac Newton lost a large fortune in which 1720 financial collapse, after which he reportedly said he could calculate the motions of heavenly bodies but not the madness of people?","a":"The South Sea Bubble","w":"Newton sold early at a profit, then bought back in near the peak and lost around 20,000 pounds, a fortune at the time. He was Master of the Royal Mint when it happened.","c":"round-4","s":"Deep-Cut History"},{"q":"The 1917 Zimmermann Telegram, intercepted by British intelligence, proposed a wartime alliance between Germany and which country?","a":"Mexico","w":"Germany offered support in recovering Texas, New Mexico and Arizona if Mexico joined the war. Its publication helped push American public opinion toward declaring war.","c":"round-4","s":"Deep-Cut History"},{"q":"During the Christmas Truce of 1914, what did soldiers on parts of the Western Front famously do in no man's land?","a":"Met, exchanged gifts and in places played football","w":"Troops sang carols across the lines, buried their dead and swapped tobacco and buttons. Commanders on both sides moved quickly to prevent it recurring in later years.","c":"round-4","s":"Deep-Cut History"},{"q":"In Operation Mincemeat in 1943, British intelligence deceived Germany about the invasion of Sicily using what?","a":"A corpse carrying fake documents","w":"A body dressed as a Royal Marines officer was released off Spain with a briefcase of false invasion plans pointing to Greece and Sardinia. Hitler moved divisions away from Sicily as a result.","c":"round-4","s":"Deep-Cut History"},{"q":"The US Army's 23rd Headquarters Special Troops, nicknamed the Ghost Army, deceived German forces using what equipment?","a":"Inflatable tanks, sound trucks and fake radio traffic","w":"About 1,100 men impersonated far larger formations with rubber vehicles and recorded engine noise. The unit's work stayed classified for decades after the war.","c":"round-4","s":"Deep-Cut History"},{"q":"In 1983 Soviet officer Stanislav Petrov almost certainly prevented a nuclear exchange by doing what?","a":"Judging a missile-attack alert to be a false alarm","w":"Satellite systems reported incoming American missiles, but Petrov reasoned a real first strike would involve far more than five. The alert was later traced to sunlight glinting off high clouds.","c":"round-4","s":"Deep-Cut History"},{"q":"During the Cuban Missile Crisis, Soviet officer Vasily Arkhipov refused to authorise what, aboard a submarine being depth-charged?","a":"The launch of a nuclear torpedo","w":"The submarine had lost radio contact and its captain believed war had begun. Three officers had to agree; Arkhipov alone said no, and the boat surfaced instead.","c":"round-4","s":"Deep-Cut History"},{"q":"The 1904 Olympic marathon in St Louis was won on a technicality after the first man to cross the line was disqualified for what?","a":"Riding much of the course in a car","w":"Fred Lorz was disqualified and Thomas Hicks was declared winner after being given strychnine and brandy by his handlers. Only 14 of 32 starters finished the chaotic race.","c":"round-4","s":"Deep-Cut History"},{"q":"Athlete Jim Thorpe was stripped of his 1912 Olympic gold medals for having done what?","a":"Played semi-professional baseball for pay","w":"He had earned a small wage playing baseball, breaching the strict amateur rules of the time. The International Olympic Committee restored his titles decades after his death.","c":"round-4","s":"Deep-Cut History"},{"q":"The Antikythera mechanism, recovered from a Greek shipwreck in 1901, turned out to be what?","a":"An ancient geared astronomical calculator","w":"Dating from around the 2nd century BC, its bronze gears predicted eclipses and tracked calendar cycles. Comparable mechanical complexity does not reappear until medieval European clocks.","c":"round-4","s":"Niche Science"},{"q":"Jean-Francois Champollion announced his decipherment of Egyptian hieroglyphs in which year, using the Rosetta Stone?","a":"1822","w":"The stone carried the same decree in hieroglyphic, Demotic and Greek. Champollion's breakthrough was realising the signs recorded sounds as well as ideas, not pictures alone.","c":"round-4","s":"Niche Science"},{"q":"The Bronze Age script Linear B was deciphered in 1952 by an English architect working in his spare time. Who was he?","a":"Michael Ventris","w":"Ventris showed the language was an early form of Greek, overturning expectations. The related Linear A script remains undeciphered to this day.","c":"round-4","s":"Niche Science"},{"q":"The Voynich manuscript, carbon dated to the early 15th century, is famous among cryptographers for what reason?","a":"Nobody has ever deciphered its writing","w":"Around 240 vellum pages combine an unknown script with drawings of unidentifiable plants and astronomical charts. Codebreakers from both world wars tried and failed.","c":"round-4","s":"Niche Science"},{"q":"The world's first webcam was created at Cambridge University in 1991 to monitor what?","a":"A coffee pot","w":"Researchers in the Trojan Room pointed a camera at the shared coffee machine so they could check the level without a wasted trip. It went online in 1993 and ran until 2001.","c":"round-4","s":"Niche Science"},{"q":"Ray Tomlinson chose which symbol to separate a user name from a host machine in the first network email?","a":"The at sign","w":"He picked it in 1971 precisely because it appeared in no one's name and already meant 'at' in commercial use. The choice made the symbol a global icon.","c":"round-4","s":"Niche Science"},{"q":"The first registered internet domain name, in March 1985, was symbolics.com. What did that company make?","a":"Lisp machines, specialised computers","w":"Symbolics built workstations designed to run the Lisp programming language. The company later declined, but the domain survives as the oldest registered dot-com.","c":"round-4","s":"Niche Science"},{"q":"The first message sent over ARPANET in 1969 was meant to be the word LOGIN. What actually arrived?","a":"LO","w":"The system crashed after two characters. Charley Kline retyped it about an hour later and the full word went through, opening the network that grew into the internet.","c":"round-4","s":"Niche Science"},{"q":"In 1847 Ignaz Semmelweis dramatically cut maternal deaths in a Vienna hospital by insisting doctors do what?","a":"Wash their hands in chlorinated lime","w":"He noticed wards staffed by doctors coming from autopsies had far higher death rates than midwife wards. His colleagues rejected the idea and he died in an asylum, decades before germ theory vindicated him.","c":"round-4","s":"Niche Science"},{"q":"In 1854 John Snow traced a deadly London cholera outbreak to a single source and had it disabled. What was it?","a":"The Broad Street water pump","w":"He mapped deaths clustering around the pump and persuaded officials to remove its handle. His work helped overturn the belief that cholera spread through foul air.","c":"round-4","s":"Niche Science"},{"q":"Railway foreman Phineas Gage survived an 1848 accident in which what passed completely through his skull?","a":"An iron tamping rod","w":"The metre-long bar entered under his cheekbone and exited through the top of his head. Reports of changes in his personality became a foundational case in the study of the frontal lobes.","c":"round-4","s":"Niche Science"},{"q":"The HeLa cell line, used in vaccine and cancer research worldwide, was taken without consent in 1951 from which patient?","a":"Henrietta Lacks","w":"Her cervical cancer cells were the first human cells to divide indefinitely in culture. Her family learned of their use only in the 1970s and received no compensation for decades.","c":"round-4","s":"Niche Science"},{"q":"Alfred Wegener proposed continental drift in 1912 but was dismissed for decades. What discovery finally vindicated him in the 1960s?","a":"Seafloor spreading and plate tectonics","w":"Wegener could not explain what moved the continents, so geologists rejected the idea. Magnetic striping on the ocean floor revealed the mechanism, long after he died on a Greenland expedition.","c":"round-4","s":"Niche Science"},{"q":"In 1984 Australian doctor Barry Marshall proved that stomach ulcers are caused by bacteria by doing what?","a":"Drinking a culture of Helicobacter pylori himself","w":"He developed gastritis within days and treated it with antibiotics. He and Robin Warren shared the 2005 Nobel Prize in Medicine for overturning the belief that ulcers were caused by stress.","c":"round-4","s":"Niche Science"},{"q":"John Harrison spent decades building marine chronometers to solve which navigational problem?","a":"Determining longitude at sea","w":"Knowing the time at a reference port lets a navigator calculate longitude from local noon. Harrison's H4 watch of 1761 kept time accurately enough despite a ship's motion and temperature swings.","c":"round-4","s":"Niche Science"},{"q":"The word sandwich comes from an 18th century English aristocrat. What was his title?","a":"The Earl of Sandwich","w":"John Montagu, the 4th Earl, reportedly asked for meat between bread so he could keep working, or gambling, without cutlery. Sandwich is a town in Kent.","c":"round-4","s":"Words and Origins"},{"q":"The word boycott comes from the surname of a land agent in 1880s Ireland. What did the community do to him?","a":"Refused all dealings with him","w":"Captain Charles Boycott evicted tenants in County Mayo, so labourers, shops and the postman cut him off entirely. Newspapers picked up his name for the tactic within weeks.","c":"round-4","s":"Words and Origins"},{"q":"The word silhouette derives from the name of a French finance minister known for what?","a":"Extreme austerity measures","w":"Etienne de Silhouette imposed harsh taxes in 1759, and his name became shorthand for anything done cheaply. Cut-paper profiles were the cheapest form of portrait available.","c":"round-4","s":"Words and Origins"},{"q":"Sideburns are named, in a rearranged form, after which American Civil War general?","a":"Ambrose Burnside","w":"His distinctive whiskers ran from ear to moustache with a clean-shaven chin. The style was called burnsides before the syllables flipped into sideburns.","c":"round-4","s":"Words and Origins"},{"q":"The word maverick comes from a Texas rancher who did what?","a":"Refused to brand his cattle","w":"Samuel Maverick's unbranded animals became known as mavericks, and the word came to mean anyone who refuses to run with the herd.","c":"round-4","s":"Words and Origins"},{"q":"Nicotine is named after Jean Nicot, a French diplomat who did what in the 1560s?","a":"Introduced tobacco to the French court","w":"Nicot sent tobacco to Catherine de' Medici as a remedy for headaches. The plant genus Nicotiana and the compound nicotine both carry his name.","c":"round-4","s":"Words and Origins"},{"q":"The saxophone is named for its Belgian inventor. What was his surname?","a":"Sax, for Adolphe Sax","w":"He patented the instrument in 1846, aiming for something with the power of brass and the agility of woodwind. He spent much of his life in lawsuits with rival makers.","c":"round-4","s":"Words and Origins"},{"q":"The leotard is named after a 19th century French acrobat who popularised the garment. What else is he credited with pioneering?","a":"The flying trapeze","w":"Jules Leotard performed in a close-fitting one-piece he called a maillot, and inspired the song The Daring Young Man on the Flying Trapeze. The garment took his name after his death.","c":"round-4","s":"Words and Origins"},{"q":"The cardigan is named after a British earl who led which disastrous military action?","a":"The Charge of the Light Brigade","w":"The 7th Earl of Cardigan led the charge at Balaclava in 1854, where his knitted waistcoat caught on. The balaclava helmet is named for the same battle.","c":"round-4","s":"Words and Origins"},{"q":"The word shrapnel comes from a British officer who invented what?","a":"An artillery shell filled with lead balls","w":"Henry Shrapnel developed his spherical case shot in the 1780s to scatter musket balls over enemy troops. His name now covers any fragment thrown out by an explosion.","c":"round-4","s":"Words and Origins"},{"q":"The guillotine is named after Joseph-Ignace Guillotin, a physician who did not invent it. What was his actual role?","a":"He proposed a swift, uniform method of execution for all","w":"Guillotin argued a mechanical device would be more humane and would end the privilege of beheading being reserved for nobles. His family later petitioned unsuccessfully to have the name changed.","c":"round-4","s":"Words and Origins"},{"q":"The word mausoleum comes from the tomb of which ancient ruler?","a":"Mausolus of Caria","w":"His enormous tomb at Halicarnassus, built around 350 BC, was one of the Seven Wonders of the Ancient World. Earthquakes eventually destroyed it, but his name outlived the building.","c":"round-4","s":"Words and Origins"},{"q":"The word laconic derives from Laconia, the region around which Greek city?","a":"Sparta","w":"Spartans were famed for terse speech. Told 'If we enter Laconia, we will raze Sparta', they are said to have replied with a single word: 'If'.","c":"round-4","s":"Words and Origins"},{"q":"The word ostracism comes from an ancient Athenian practice. What did citizens write names on to banish someone for ten years?","a":"Broken pieces of pottery, called ostraka","w":"Each year Athenians could vote to exile one citizen without charge or trial. Thousands of inscribed shards have been excavated, some prepared in advance in the same handwriting.","c":"round-4","s":"Words and Origins"},{"q":"The words nickname, apron and umpire all changed shape through the same linguistic process. What happened to them?","a":"The letter n moved between the article and the noun","w":"An eke name became a nickname, a napron became an apron, and a noumpere became an umpire. Linguists call this rebracketing, or metanalysis.","c":"round-4","s":"Words and Origins"},{"q":"The marathon distance commemorates a run described by Greek historians. What news was the runner carrying?","a":"The Athenian victory over Persia at Marathon","w":"The story of Pheidippides running to Athens comes from sources written centuries later and may be legend. The modern 42.195 km distance was fixed at the 1908 London Olympics.","c":"round-4","s":"Words and Origins"},{"q":"The Japanese word tsundoku describes which specific habit?","a":"Acquiring books and letting them pile up unread","w":"It combines tsunde-oku, to pile things up and leave them, with doku, to read. The term dates to at least the Meiji era and carries gentle self-mockery rather than shame.","c":"round-4","s":"Cultural Oddities"},{"q":"The German word Kummerspeck literally translates as what?","a":"Grief bacon","w":"It refers to the weight gained from emotional overeating. German is full of such compounds, including Torschlusspanik, or gate-shut panic, meaning the fear of time running out.","c":"round-4","s":"Cultural Oddities"},{"q":"The Japanese aesthetic of wabi-sabi finds beauty in what?","a":"Imperfection, impermanence and incompleteness","w":"It values the weathered, asymmetric and worn over the flawless. The related craft of kintsugi repairs broken pottery with gold, making the damage the most striking feature.","c":"round-4","s":"Cultural Oddities"},{"q":"The word defenestration has an unusually specific meaning. What is it?","a":"The act of throwing someone or something out of a window","w":"It comes from the Latin fenestra, meaning window. The word owes its survival largely to the Defenestrations of Prague in 1419 and 1618, both of which helped start wars.","c":"round-4","s":"Cultural Oddities"},{"q":"Which country hosted the first FIFA World Cup in 1930 and won the tournament on home soil?","a":"Uruguay","w":"Uruguay staged the inaugural 1930 World Cup entirely in Montevideo and beat Argentina 4-2 in the final. Only 13 teams took part.","c":"round-5","s":"Sports"},{"q":"In 1954 Roger Bannister became the first person to run a mile in under four minutes. In which English city did he do it?","a":"Oxford","w":"Bannister ran 3:59.4 on May 6, 1954, at the Iffley Road track in Oxford, paced by Chris Brasher and Chris Chataway. His record lasted just 46 days before Australia's John Landy broke it.","c":"round-5","s":"Sports"},{"q":"Muhammad Ali regained the heavyweight title by beating George Foreman in the 1974 'Rumble in the Jungle.' In which African country was the fight held?","a":"Zaire (now the Democratic Republic of the Congo)","w":"The fight took place in Kinshasa, Zaire, on October 30, 1974. Ali soaked up Foreman's punches with his 'rope-a-dope' tactic before knocking him out in the eighth round.","c":"round-5","s":"Sports"},{"q":"Diego Maradona's 'Hand of God' goal came against which country in the 1986 World Cup quarter-final?","a":"England","w":"Maradona punched the ball past Peter Shilton in Mexico City, then minutes later dribbled past half the England team for what was later voted the Goal of the Century. Argentina won 2-1 and went on to lift the trophy.","c":"round-5","s":"Sports"},{"q":"Which nation won the first Rugby World Cup in 1987?","a":"New Zealand","w":"The All Blacks beat France 29-9 in the 1987 final at Eden Park in Auckland. New Zealand and Australia co-hosted the inaugural tournament.","c":"round-5","s":"Sports"},{"q":"In snooker, what is the highest possible break in a standard frame with no free ball?","a":"147","w":"A maximum break comes from potting all 15 reds each followed by a black, then clearing the six colours. It is known simply as a maximum or a 147.","c":"round-5","s":"Sports"},{"q":"Which Formula 1 driver won seven world championships between 1994 and 2004, a total later equalled by Lewis Hamilton?","a":"Michael Schumacher","w":"Schumacher took two titles with Benetton in 1994 and 1995, then five straight with Ferrari from 2000 to 2004. Hamilton matched his total of seven in 2020.","c":"round-5","s":"Sports"},{"q":"Which American horse race, first run at Churchill Downs in 1875, is nicknamed 'The Run for the Roses'?","a":"The Kentucky Derby","w":"First run in 1875, the Derby is held at Churchill Downs in Louisville; the distance was cut from a mile and a half to the present mile and a quarter in 1896. The winning horse is draped in a blanket of red roses, hence the nickname.","c":"round-5","s":"Sports"},{"q":"Nadia Comaneci scored the first perfect 10 in Olympic gymnastics history at which 1976 Games?","a":"Montreal","w":"The 14-year-old Romanian earned the first 10.0 on the uneven bars in Montreal, and the scoreboard, unable to display it, showed 1.00 instead. She scored seven perfect 10s at those Games.","c":"round-5","s":"Sports"},{"q":"The 'Miracle on Ice' at the 1980 Winter Olympics saw the United States beat which team in ice hockey?","a":"The Soviet Union","w":"A US squad of amateurs and college players beat the four-time defending champion Soviets 4-3 at Lake Placid, then clinched gold against Finland. Broadcaster Al Michaels asked, 'Do you believe in miracles?'","c":"round-5","s":"Sports"},{"q":"Which tennis player won all four Grand Slam singles titles plus Olympic gold in 1988, a feat dubbed the Golden Slam?","a":"Steffi Graf","w":"Graf won the Australian Open, French Open, Wimbledon, and US Open in 1988, then took singles gold at the Seoul Olympics, completing the calendar-year Golden Slam at age 19.","c":"round-5","s":"Sports"},{"q":"Pele won the first of his three World Cups as a 17-year-old in which year?","a":"1958","w":"Pele scored twice in the 1958 final as Brazil beat hosts Sweden 5-2. He added titles in 1962 and 1970, becoming the first player to win three World Cups.","c":"round-5","s":"Sports"},{"q":"In which year were the first modern Olympic Games held in Athens?","a":"1896","w":"The first modern Olympics ran in April 1896, driven by Pierre de Coubertin's new International Olympic Committee. American James Connolly became the first modern champion by winning the triple jump.","c":"round-5","s":"Sports"},{"q":"Which English football club went unbeaten through the entire 2003-04 Premier League season, earning the nickname 'The Invincibles'?","a":"Arsenal","w":"Arsene Wenger's Arsenal won the 2003-04 title with 26 wins and 12 draws in 38 games. They stretched the unbeaten league run to 49 matches before losing to Manchester United in October 2004.","c":"round-5","s":"Sports"},{"q":"Michael Jordan won six NBA championships with the Chicago Bulls. How many NBA Finals MVP awards did he collect?","a":"6","w":"Jordan was named Finals MVP in all six Bulls title runs: 1991, 1992, 1993, 1996, 1997, and 1998. Chicago completed two separate three-peats either side of his first retirement.","c":"round-5","s":"Sports"},{"q":"The Ashes cricket series is contested between England and which other country?","a":"Australia","w":"The rivalry dates to 1882, when a mock obituary declared English cricket dead after a home defeat to Australia. The tiny terracotta urn said to hold the ashes is kept at Lord's.","c":"round-5","s":"Sports"},{"q":"What colour jersey does the overall leader of the Tour de France wear?","a":"Yellow","w":"The yellow jersey, or maillot jaune, was introduced in 1919 and reportedly matched the yellow paper of the sponsoring newspaper L'Auto. The rider with the lowest cumulative time wears it each day.","c":"round-5","s":"Sports"},{"q":"At which Olympics did American sprinters Tommie Smith and John Carlos raise gloved fists on the 200m medal podium?","a":"Mexico City 1968","w":"Gold medallist Smith and bronze medallist Carlos bowed their heads and raised black-gloved fists during the anthem in a human rights salute. Under IOC pressure, both were sent home from the Games.","c":"round-5","s":"Sports"},{"q":"The 1992 Barcelona Olympics featured the original 'Dream Team.' Which sport did that famous American squad play?","a":"Basketball","w":"The 1992 Dream Team, with Michael Jordan, Magic Johnson, and Larry Bird, was the first US Olympic squad to use active NBA players. It won its eight games by an average of almost 44 points.","c":"round-5","s":"Sports"},{"q":"Jesse Owens won four gold medals at which Olympic Games, hosted in Nazi Germany?","a":"Berlin 1936","w":"Owens won the 100m, 200m, long jump, and 4x100m relay in Berlin, undercutting Nazi racial propaganda. His sweep of those same four events was not matched until Carl Lewis repeated it at the 1984 Los Angeles Games.","c":"round-5","s":"Sports"},{"q":"Which Beatles album, released in 1969, shows the band walking across a zebra crossing on its cover?","a":"Abbey Road","w":"The cover was shot on August 8, 1969, on the crossing outside EMI Studios on Abbey Road in London. A barefoot Paul McCartney helped fuel the 'Paul is dead' conspiracy theory.","c":"round-5","s":"Music"},{"q":"Elvis Presley's Graceland mansion is in which US city?","a":"Memphis, Tennessee","w":"Elvis bought Graceland in 1957 for about 100,000 dollars and is buried there in the Meditation Garden. The mansion opened to the public in 1982 and remains a major tourist draw.","c":"round-5","s":"Music"},{"q":"Which band's 1973 album The Dark Side of the Moon logged more than 900 weeks on the Billboard 200 chart?","a":"Pink Floyd","w":"Released in 1973, The Dark Side of the Moon stayed on the Billboard 200 for a record 741 consecutive weeks until 1988, then returned after chart rule changes and became the first album ever to pass 900 total weeks. Its worldwide sales are estimated at around 45 million copies.","c":"round-5","s":"Music"},{"q":"The twin Live Aid concerts of July 1985 were held at Wembley Stadium in London and which US city's JFK Stadium?","a":"Philadelphia","w":"Live Aid on July 13, 1985, organised by Bob Geldof and Midge Ure, raised money for Ethiopian famine relief. Queen's 20-minute Wembley set is often ranked among the greatest live performances ever.","c":"round-5","s":"Music"},{"q":"Which 1977 Fleetwood Mac album, recorded while the band's couples were breaking up, contains Go Your Own Way and Dreams?","a":"Rumours","w":"Rumours won the Grammy for Album of the Year in 1978 and has sold over 40 million copies. Dreams, written by Stevie Nicks, became the band's only US number one single.","c":"round-5","s":"Music"},{"q":"Bruce Springsteen's best-selling album, released in 1984, shares its name with which title track about a Vietnam veteran?","a":"Born in the U.S.A.","w":"Born in the U.S.A. produced seven top-ten US singles and sold over 15 million copies in America. The anthemic title track is often misread as patriotic despite its hard-luck lyrics.","c":"round-5","s":"Music"},{"q":"Which Swedish group won the 1974 Eurovision Song Contest with Waterloo?","a":"ABBA","w":"ABBA's victory in Brighton launched them to global fame. Waterloo topped charts across Europe, and the group became one of the best-selling acts in pop history.","c":"round-5","s":"Music"},{"q":"David Bowie retired which flame-haired alter ego on stage at London's Hammersmith Odeon in July 1973?","a":"Ziggy Stardust","w":"On July 3, 1973, Bowie stunned fans by announcing it was 'the last show that we'll ever do,' killing off the Ziggy Stardust persona. The 1972 Ziggy album had made him a superstar.","c":"round-5","s":"Music"},{"q":"Which reggae legend, who recorded No Woman No Cry with the Wailers, died in 1981 at the age of 36?","a":"Bob Marley","w":"Marley died of cancer in Miami in May 1981. His 1984 compilation Legend went on to become the best-selling reggae album of all time.","c":"round-5","s":"Music"},{"q":"Which Nirvana frontman joined the so-called 27 Club upon his death in April 1994?","a":"Kurt Cobain","w":"Cobain joined Jimi Hendrix, Janis Joplin, Jim Morrison, and Brian Jones, all of whom died at 27 between 1969 and 1971. Amy Winehouse joined the grim list in 2011.","c":"round-5","s":"Music"},{"q":"Whitney Houston's I Will Always Love You, from The Bodyguard (1992), was written and first recorded by which country star?","a":"Dolly Parton","w":"Parton wrote the song as a farewell to her mentor and duet partner Porter Wagoner, and her original recording topped the US country chart in 1974. Houston's version spent 14 weeks at number one on the Billboard Hot 100, a record for a single at the time.","c":"round-5","s":"Music"},{"q":"Which Motown group fronted by Diana Ross scored 12 US number one singles during the 1960s?","a":"The Supremes","w":"Between 1964 and 1969 the Supremes topped the US chart 12 times, with hits including Baby Love and Stop! In the Name of Love, the most number ones of any American group in that decade.","c":"round-5","s":"Music"},{"q":"Simon and Garfunkel's final studio album, released in 1970, shares its name with which chart-topping ballad?","a":"Bridge Over Troubled Water","w":"Both the album and its title track topped the US charts, and the song won Grammys for Record of the Year and Song of the Year in 1971. The duo split soon after its release.","c":"round-5","s":"Music"},{"q":"Which guitarist closed the 1969 Woodstock festival with a distorted solo version of The Star-Spangled Banner?","a":"Jimi Hendrix","w":"Hendrix played on the Monday morning to a thinned-out crowd, and his feedback-laden anthem became an emblem of the era. He died in London in September 1970 at age 27.","c":"round-5","s":"Music"},{"q":"What was Madonna's first UK number one single, a 1985 song featured in the film Desperately Seeking Susan?","a":"Into the Groove","w":"Into the Groove spent four weeks at UK number one in the summer of 1985 and became one of the defining dance-pop hits of the decade.","c":"round-5","s":"Music"},{"q":"Which Beatle wrote and sang the 1965 ballad Yesterday, recorded with only an acoustic guitar and a string quartet?","a":"Paul McCartney","w":"McCartney recorded Yesterday without the other Beatles in June 1965. He said the melody came to him in a dream, and his working title was 'Scrambled Eggs.'","c":"round-5","s":"Music"},{"q":"Johnny Cash recorded a career-reviving live album in January 1968 at which California prison?","a":"Folsom Prison","w":"At Folsom Prison topped the country album chart and revived Cash's career. He followed it in 1969 with another live prison album, At San Quentin.","c":"round-5","s":"Music"},{"q":"Aretha Franklin's 1967 signature hit Respect was originally written and recorded by which soul singer?","a":"Otis Redding","w":"Redding recorded Respect in 1965; Franklin's rearranged 1967 version added the spelled-out R-E-S-P-E-C-T hook and hit US number one. Redding died in a plane crash in December 1967.","c":"round-5","s":"Music"},{"q":"Which 1939 film starring Judy Garland follows Dorothy down the Yellow Brick Road?","a":"The Wizard of Oz","w":"Garland won a special juvenile Oscar for her work, including her role as Dorothy. The film's switch from sepia Kansas to Technicolor Oz was a landmark moment in colour cinema.","c":"round-5","s":"Movies & TV"},{"q":"What was Walt Disney's first feature-length animated film, released in 1937?","a":"Snow White and the Seven Dwarfs","w":"Dubbed 'Disney's Folly' during production, Snow White premiered in December 1937 and became a massive hit. Disney received an honorary Oscar accompanied by seven miniature statuettes.","c":"round-5","s":"Movies & TV"},{"q":"In Star Wars: The Empire Strikes Back (1980), who is revealed to be Luke Skywalker's father?","a":"Darth Vader","w":"The line is widely misquoted as 'Luke, I am your father'; Vader actually says 'No, I am your father.' The twist was kept so secret that a decoy line was spoken on set.","c":"round-5","s":"Movies & TV"},{"q":"Which 1975 Steven Spielberg shark thriller is often called the first summer blockbuster?","a":"Jaws","w":"Jaws became the highest-grossing film released up to that point and pioneered the wide-release summer blockbuster model. The malfunctioning mechanical shark, nicknamed Bruce, forced Spielberg to keep it mostly off screen.","c":"round-5","s":"Movies & TV"},{"q":"Which actor was the first to play James Bond in the Eon film series, starting with Dr. No in 1962?","a":"Sean Connery","w":"Connery played Bond in six official Eon films between 1962 and 1971, plus 1983's unofficial Never Say Never Again. Dr. No introduced the line 'Bond, James Bond.'","c":"round-5","s":"Movies & TV"},{"q":"Which 1942 romance set in wartime Morocco features the line 'Here's looking at you, kid'?","a":"Casablanca","w":"Humphrey Bogart's Rick says the line to Ingrid Bergman's Ilsa. Casablanca won Best Picture, while the often-quoted 'Play it again, Sam' is never actually said in the film.","c":"round-5","s":"Movies & TV"},{"q":"Alfred Hitchcock's Psycho (1960) contains one of cinema's most famous murder scenes. Where in the Bates Motel does it happen?","a":"In the shower","w":"The shower scene runs under a minute but used dozens of camera setups, cut to Bernard Herrmann's shrieking strings. Chocolate syrup stood in for blood in the black-and-white footage.","c":"round-5","s":"Movies & TV"},{"q":"Which 1994 Disney animated film about Simba and Mufasa was the highest-grossing movie in the world that year?","a":"The Lion King","w":"The Lion King topped the 1994 worldwide box office and won two Oscars for its music, including Best Original Song for Elton John and Tim Rice's Can You Feel the Love Tonight.","c":"round-5","s":"Movies & TV"},{"q":"Who directed The Lord of the Rings trilogy, shot entirely in his native New Zealand?","a":"Peter Jackson","w":"Jackson filmed all three movies back to back in New Zealand. The Return of the King won 11 Oscars in 2004, sweeping every category in which it was nominated.","c":"round-5","s":"Movies & TV"},{"q":"In Back to the Future (1985), what make of car does Doc Brown convert into a time machine?","a":"A DeLorean","w":"The DeLorean DMC-12 time machine needs 1.21 gigawatts of power and a speed of 88 miles per hour. Early drafts of the script had the time machine built from a refrigerator.","c":"round-5","s":"Movies & TV"},{"q":"Which sitcom, set in a Boston bar 'where everybody knows your name,' ran on NBC from 1982 to 1993?","a":"Cheers","w":"Cheers ran for 275 episodes and launched the spin-off Frasier. Its 1993 finale ranks among the most watched series finales in US television history.","c":"round-5","s":"Movies & TV"},{"q":"Which actor won a posthumous Oscar for playing the Joker in The Dark Knight (2008)?","a":"Heath Ledger","w":"Ledger died in January 2008, six months before the film's release. His Best Supporting Actor win was only the second posthumous acting Oscar, after Peter Finch's for Network.","c":"round-5","s":"Movies & TV"},{"q":"What is the name of the hidden, technologically advanced African nation in Marvel's Black Panther (2018)?","a":"Wakanda","w":"Wakanda's power is built on the fictional metal vibranium. Black Panther became the first superhero film nominated for the Best Picture Oscar and won three Academy Awards.","c":"round-5","s":"Movies & TV"},{"q":"E.T. the Extra-Terrestrial (1982) famously boosted sales of which candy after M&M's turned the filmmakers down?","a":"Reese's Pieces","w":"Mars declined to let M&M's appear, so Elliott lures E.T. with Hershey's Reese's Pieces instead. Sales reportedly jumped sharply within weeks of the film's release.","c":"round-5","s":"Movies & TV"},{"q":"Which 1993 film brought cloned dinosaurs to life at a theme park on the fictional island of Isla Nublar?","a":"Jurassic Park","w":"Spielberg's Jurassic Park mixed animatronics with breakthrough computer graphics and overtook E.T. to become the highest-grossing film released up to that time. It won three technical Oscars.","c":"round-5","s":"Movies & TV"},{"q":"In The Matrix (1999), which colour pill does Neo swallow to learn the truth?","a":"The red pill","w":"Morpheus offers a choice: the blue pill returns Neo to comfortable illusion, while the red pill reveals the truth about the Matrix. Neo takes the red pill and wakes in the real world.","c":"round-5","s":"Movies & TV"},{"q":"What is the capital city of Canada?","a":"Ottawa","w":"Queen Victoria selected Ottawa in 1857, partly for its safe distance from the US border and its position between English and French Canada. Toronto is the largest city.","c":"round-5","s":"Geography & Food"},{"q":"Which Himalayan country's national flag is shaped as two stacked triangular pennants rather than a rectangle?","a":"Nepal","w":"Nepal's crimson double-pennant flag, formalised in 1962, carries a white moon and sun. It is the only national flag in the world that is not a quadrilateral.","c":"round-5","s":"Geography & Food"},{"q":"Which river, generally regarded as the world's longest, flows north through Egypt into the Mediterranean?","a":"The Nile","w":"The Nile runs about 6,650 kilometres from the African Great Lakes region to its Mediterranean delta. Ancient Egyptian civilisation grew up along its banks.","c":"round-5","s":"Geography & Food"},{"q":"Mount Kilimanjaro, Africa's highest peak, stands in which country?","a":"Tanzania","w":"Kilimanjaro rises about 5,895 metres near Tanzania's border with Kenya and is the world's tallest free-standing mountain. Its summit is called Uhuru Peak.","c":"round-5","s":"Geography & Food"},{"q":"Which two countries share the longest international land border in the world?","a":"The United States and Canada","w":"The US-Canada border runs about 8,890 kilometres including the Alaska-Yukon stretch. It is often described as the longest undefended border in the world.","c":"round-5","s":"Geography & Food"},{"q":"Istanbul famously straddles two continents. Which strait separates its European and Asian sides?","a":"The Bosphorus","w":"The Bosphorus connects the Black Sea to the Sea of Marmara and marks the divide between Europe and Asia. Istanbul, formerly Constantinople, spans both banks.","c":"round-5","s":"Geography & Food"},{"q":"Which South American city, sitting at about 3,640 metres in the Andes, is the world's highest seat of national government?","a":"La Paz, Bolivia","w":"La Paz houses Bolivia's government at roughly 3,640 metres above sea level, making it the highest administrative capital on Earth. Sucre remains Bolivia's constitutional capital.","c":"round-5","s":"Geography & Food"},{"q":"Which country's national flag, known as the Hinomaru, shows a single red disc on a white field?","a":"Japan","w":"The red disc represents the sun, fitting Japan's nickname, the Land of the Rising Sun. The flag's design was formally standardised by law in 1999.","c":"round-5","s":"Geography & Food"},{"q":"Which African country, home to Addis Ababa, was formerly known as Abyssinia?","a":"Ethiopia","w":"Ethiopia, historically called Abyssinia, defeated an invading Italian army at the Battle of Adwa in 1896 and is often cited as the only African nation never fully colonised.","c":"round-5","s":"Geography & Food"},{"q":"The Great Barrier Reef lies off the coast of which Australian state?","a":"Queensland","w":"The reef stretches about 2,300 kilometres along the Queensland coast and is the world's largest coral reef system. It was inscribed as a World Heritage site in 1981.","c":"round-5","s":"Geography & Food"},{"q":"Budapest was formed in 1873 by uniting Buda and Pest, which face each other across which river?","a":"The Danube","w":"Buda on the west bank merged with Pest on the east, along with Obuda, in 1873. The Danube flows through four European capitals, more than any other river.","c":"round-5","s":"Geography & Food"},{"q":"What is the world's largest island, excluding continental landmasses?","a":"Greenland","w":"Greenland covers about 2.16 million square kilometres and is an autonomous territory of Denmark. Australia is bigger but is classed as a continental landmass.","c":"round-5","s":"Geography & Food"},{"q":"Paella, the famous saffron rice dish, originated in which region of Spain?","a":"Valencia","w":"Paella comes from the Valencia region, where the traditional version uses rabbit, chicken, and beans rather than seafood. The dish takes its name from the wide shallow pan it is cooked in.","c":"round-5","s":"Geography & Food"},{"q":"Which spirit must take its dominant flavour from juniper berries?","a":"Gin","w":"By definition gin is a juniper-flavoured spirit, and the classic Martini pairs it with dry vermouth, garnished with an olive or a lemon twist.","c":"round-5","s":"Geography & Food"},{"q":"Sparkling wine may only be labelled Champagne if it comes from the Champagne region of which country?","a":"France","w":"The Champagne name is legally protected for sparkling wine made in the Champagne region using approved methods. Similar sparkling wine from elsewhere in France is called cremant.","c":"round-5","s":"Geography & Food"},{"q":"The paprika-spiced stew goulash originated in which European country?","a":"Hungary","w":"Goulash began as the stew of Hungarian cattle herdsmen, whose name, gulyas, gave the dish its title. Paprika remains the signature spice of Hungarian cooking.","c":"round-5","s":"Geography & Food"},{"q":"The frankfurter sausage takes its name from a city in which country?","a":"Germany","w":"The frankfurter is named after Frankfurt am Main, long famous for its pork sausages. The wiener, similarly, takes its name from Wien, the German name for Vienna.","c":"round-5","s":"Geography & Food"},{"q":"In which year did the Berlin Wall fall?","a":"1989","w":"On November 9, 1989, East Germany announced its citizens could cross freely, and crowds began dismantling the wall that night. Germany formally reunified in October 1990.","c":"round-5","s":"History"},{"q":"In which year did the RMS Titanic sink on its maiden voyage?","a":"1912","w":"Titanic struck an iceberg late on April 14, 1912, and sank in the early hours of April 15, killing about 1,500 people. The wreck was finally located on the Atlantic seabed in 1985.","c":"round-5","s":"History"},{"q":"Who was the first person to walk on the Moon, in July 1969?","a":"Neil Armstrong","w":"Armstrong stepped onto the Moon on July 20, 1969, during Apollo 11, followed by Buzz Aldrin while Michael Collins orbited above. An estimated 600 million people watched.","c":"round-5","s":"History"},{"q":"Which of the Seven Wonders of the Ancient World still stands largely intact at Giza?","a":"The Great Pyramid of Giza","w":"Built for the pharaoh Khufu around 2560 BCE, the Great Pyramid is the only ancient wonder still substantially intact. It was the world's tallest man-made structure for over 3,800 years.","c":"round-5","s":"History"},{"q":"In which year did King John of England seal the Magna Carta at Runnymede?","a":"1215","w":"King John sealed Magna Carta in June 1215 under pressure from rebel barons. Its clauses limiting arbitrary royal power became a foundation stone of constitutional law.","c":"round-5","s":"History"},{"q":"Which ship carried the Pilgrims from England to America in 1620?","a":"The Mayflower","w":"The Mayflower left Plymouth, England, and reached Cape Cod in November 1620 with about 102 passengers. The settlers founded Plymouth Colony in present-day Massachusetts.","c":"round-5","s":"History"},{"q":"Who served as British Prime Minister for most of World War II?","a":"Winston Churchill","w":"Churchill led Britain from May 1940 to July 1945, then served again from 1951 to 1955. He was voted out in the July 1945 election just weeks after victory in Europe.","c":"round-5","s":"History"},{"q":"The assassination of Archduke Franz Ferdinand in Sarajevo in 1914 triggered which global conflict?","a":"World War I","w":"Gavrilo Princip shot the Austro-Hungarian heir and his wife Sophie on June 28, 1914. Within weeks, Europe's chain of alliances pulled the continent into war.","c":"round-5","s":"History"},{"q":"Which French military leader was finally defeated at the Battle of Waterloo in 1815?","a":"Napoleon Bonaparte","w":"Napoleon was beaten by Wellington's allied army and Blucher's Prussians near Waterloo in present-day Belgium on June 18, 1815. He was exiled to Saint Helena, where he died in 1821.","c":"round-5","s":"History"},{"q":"Martin Luther King Jr. delivered his 'I Have a Dream' speech in 1963 from the steps of which Washington DC monument?","a":"The Lincoln Memorial","w":"King addressed some 250,000 people at the March on Washington on August 28, 1963. The most famous passage was partly improvised after singer Mahalia Jackson urged him to 'tell them about the dream.'","c":"round-5","s":"History"},{"q":"Which English king had six wives, including Anne Boleyn and Catherine of Aragon?","a":"Henry VIII","w":"The fates of Henry VIII's wives are remembered as divorced, beheaded, died, divorced, beheaded, survived. His break with Rome created the Church of England.","c":"round-5","s":"History"},{"q":"The Roman city of Pompeii was buried by the eruption of which volcano in 79 CE?","a":"Mount Vesuvius","w":"Vesuvius buried Pompeii and neighbouring Herculaneum under metres of ash and pumice. The preserved ruins, rediscovered in the 18th century, give a snapshot of Roman daily life.","c":"round-5","s":"History"},{"q":"Who became the first woman to fly solo across the Atlantic in 1932?","a":"Amelia Earhart","w":"Earhart flew from Newfoundland to Northern Ireland in about 15 hours in May 1932. She vanished over the Pacific in 1937 while attempting a round-the-world flight.","c":"round-5","s":"History"},{"q":"Which empire ruled from Tenochtitlan, the city on whose ruins Mexico City was built?","a":"The Aztec Empire","w":"Tenochtitlan, founded on an island in Lake Texcoco around 1325, was the Aztec capital until Hernan Cortes captured it in 1521. Mexico City rose on its ruins.","c":"round-5","s":"History"},{"q":"In which year was Nelson Mandela elected president in South Africa's first fully multiracial election?","a":"1994","w":"Mandela's ANC won the April 1994 election, and he was inaugurated on May 10, four years after his release from 27 years in prison. He served a single five-year term.","c":"round-5","s":"History"},{"q":"The Hundred Years' War, which actually lasted 116 years, was fought mainly between which two countries?","a":"England and France","w":"The war ran from 1337 to 1453 over rival claims to the French throne. Joan of Arc's intervention at Orleans in 1429 helped turn the conflict in France's favour.","c":"round-5","s":"History"},{"q":"What is the chemical name for ordinary table salt?","a":"Sodium chloride (NaCl)","w":"Its formula NaCl pairs Na, from the Latin 'natrium,' with Cl for chlorine. Chlorine is a poisonous gas on its own, but bonded with sodium it becomes the salt we eat every day.","c":"round-6","s":"Science & Technology"},{"q":"Which element is the most abundant in the universe?","a":"Hydrogen","w":"Hydrogen makes up about three quarters of all normal matter by mass and is the simplest atom, with just one proton and one electron. Stars shine by fusing it into helium.","c":"round-6","s":"Science & Technology"},{"q":"What does the atomic number of a chemical element tell you?","a":"The number of protons in its nucleus","w":"The proton count defines the element itself: every atom with six protons is carbon, and every atom with 79 is gold. The periodic table is ordered by atomic number.","c":"round-6","s":"Science & Technology"},{"q":"Which Russian chemist created the periodic table of the elements in 1869?","a":"Dmitri Mendeleev","w":"Mendeleev arranged the elements by their properties and boldly left gaps for ones not yet discovered. When gallium and germanium were later found, they matched his predictions closely.","c":"round-6","s":"Science & Technology"},{"q":"On the pH scale, what number represents a neutral substance such as pure water?","a":"7","w":"Values below 7 are acidic and values above 7 are alkaline. The scale is logarithmic, so lemon juice at about pH 2 is vastly more acidic than black coffee at about pH 5.","c":"round-6","s":"Science & Technology"},{"q":"Which is the only metal that is liquid at room temperature?","a":"Mercury","w":"Mercury stays liquid down to about minus 39 degrees Celsius. Its symbol Hg comes from 'hydrargyrum,' a Latinized Greek word meaning 'water-silver,' and it long filled thermometers before safer liquids replaced it.","c":"round-6","s":"Science & Technology"},{"q":"Diamond and graphite are both made purely of which chemical element?","a":"Carbon","w":"They are allotropes: the same element with different atomic arrangements. Tightly bonded carbon makes diamond the hardest natural material, while graphite's loose layers slide apart, which is why pencils write.","c":"round-6","s":"Science & Technology"},{"q":"What name is given to the lowest temperature theoretically possible, minus 273.15 degrees Celsius?","a":"Absolute zero","w":"Absolute zero is 0 on the Kelvin scale, the point where particles have minimal motion. Laboratories can get within a whisker of it, but it can never quite be reached.","c":"round-6","s":"Science & Technology"},{"q":"Roughly how fast does light travel through a vacuum?","a":"About 300,000 kilometres per second","w":"More precisely, light travels at 299,792.458 km per second, the universal speed limit that nothing with mass can reach. Even at that speed, sunlight takes about eight minutes to arrive at Earth.","c":"round-6","s":"Science & Technology"},{"q":"What is the process called in which an atom's nucleus splits into smaller nuclei, releasing large amounts of energy?","a":"Nuclear fission","w":"Fission of uranium or plutonium is what powers nuclear reactors. Its opposite, fusion, joins light nuclei together and is the process that powers the Sun.","c":"round-6","s":"Science & Technology"},{"q":"Which scientist used a glass prism to show that white light is made up of all the colours of the rainbow?","a":"Isaac Newton","w":"In experiments in the 1660s, Newton split sunlight into a spectrum with one prism and recombined it into white light with another, proving the colours came from the light itself, not the glass.","c":"round-6","s":"Science & Technology"},{"q":"Sound waves, unlike light, cannot cross the vacuum of space because they need what to carry them?","a":"A medium (matter such as air or water)","w":"Sound is a vibration passed from particle to particle, so with no matter there is nothing to vibrate. That is why even the biggest explosion in space would be completely silent.","c":"round-6","s":"Science & Technology"},{"q":"Who discovered the radioactive elements polonium and radium, becoming the first person to win Nobel Prizes in two different sciences?","a":"Marie Curie","w":"Curie won the 1903 Physics prize for radioactivity research and the 1911 Chemistry prize for discovering polonium and radium. She named polonium after Poland, her homeland.","c":"round-6","s":"Science & Technology"},{"q":"Which ancient Greek thinker reportedly leapt from his bath shouting 'Eureka!' after discovering the principle of buoyancy?","a":"Archimedes","w":"Archimedes of Syracuse realised a submerged object displaces its own volume of water, solving the problem of testing whether the king's crown was pure gold. 'Eureka' means 'I have found it.'","c":"round-6","s":"Science & Technology"},{"q":"Newton's First Law of Motion, which says objects keep moving unless acted on by a force, is also known by what name?","a":"The law of inertia","w":"Inertia is matter's resistance to changes in motion: a rolling ball would roll forever without friction or another force. Galileo described the idea before Newton formalised it in 1687.","c":"round-6","s":"Science & Technology"},{"q":"Which gas do plants take in from the air to carry out photosynthesis?","a":"Carbon dioxide","w":"Plants absorb carbon dioxide through tiny pores called stomata and combine it with water, using sunlight, to make glucose. The oxygen they release as a by-product is what we breathe.","c":"round-6","s":"Science & Technology"},{"q":"What is the name of the famous twisted-ladder shape of the DNA molecule?","a":"The double helix","w":"James Watson and Francis Crick described DNA's double helix in 1953, drawing on X-ray images made by Rosalind Franklin. The ladder's rungs are paired bases that spell out the genetic code.","c":"round-6","s":"Science & Technology"},{"q":"Which British naturalist proposed the theory of evolution by natural selection in his 1859 book 'On the Origin of Species'?","a":"Charles Darwin","w":"Darwin developed his ideas after a five-year voyage aboard HMS Beagle, including famous observations of finches in the Galapagos Islands, then delayed publishing for about two decades.","c":"round-6","s":"Science & Technology"},{"q":"What green pigment in plant leaves captures sunlight for photosynthesis?","a":"Chlorophyll","w":"Chlorophyll absorbs mainly red and blue light and reflects green, which is why leaves look green. When it breaks down in autumn, hidden yellow and orange pigments show through.","c":"round-6","s":"Science & Technology"},{"q":"How many legs does an insect have?","a":"Six","w":"All adult insects have six legs and three body sections: head, thorax, and abdomen. Spiders have eight legs, an easy way to tell they are arachnids, not insects.","c":"round-6","s":"Science & Technology"},{"q":"What is the hard-cased pupa stage of a butterfly called, in which the caterpillar transforms into an adult?","a":"A chrysalis","w":"Inside the chrysalis the caterpillar's body is largely broken down and rebuilt into the winged adult. Moths differ: many spin a silk cocoon around their pupa instead.","c":"round-6","s":"Science & Technology"},{"q":"Which scientist discovered penicillin in 1928 after mould contaminated a bacterial culture dish in his London laboratory?","a":"Alexander Fleming","w":"Fleming noticed that Penicillium mould had killed the bacteria around it. The find led to the first mass-produced antibiotic, and he shared the 1945 Nobel Prize with Howard Florey and Ernst Chain.","c":"round-6","s":"Science & Technology"},{"q":"The blue whale, the largest animal known to have ever lived, belongs to which class of animals?","a":"Mammals","w":"Blue whales breathe air, are warm-blooded, and nurse their calves on milk, all hallmarks of mammals. At up to about 30 metres long, they outweigh any known dinosaur.","c":"round-6","s":"Science & Technology"},{"q":"What is the largest organ of the human body?","a":"The skin","w":"An adult's skin covers roughly 2 square metres and accounts for about 15 percent of body weight. It regulates temperature, blocks germs, and constantly renews itself.","c":"round-6","s":"Science & Technology"},{"q":"How many bones are there in a typical adult human skeleton?","a":"206","w":"Babies are born with around 300 bones and cartilage pieces, many of which fuse during growth. More than half of an adult's 206 bones are in the hands and feet.","c":"round-6","s":"Science & Technology"},{"q":"What is the smallest bone in the human body?","a":"The stapes","w":"The stirrup-shaped stapes in the middle ear is only about 3 millimetres long. Together with the hammer and anvil bones, it passes sound vibrations from the eardrum to the inner ear.","c":"round-6","s":"Science & Technology"},{"q":"How many chambers does the human heart have?","a":"Four","w":"Two atria receive blood and two ventricles pump it out. The right side sends blood to the lungs to pick up oxygen, while the muscular left side pushes it around the entire body.","c":"round-6","s":"Science & Technology"},{"q":"What iron-rich protein in red blood cells carries oxygen around the body?","a":"Haemoglobin","w":"Haemoglobin binds oxygen in the lungs and releases it in the tissues. Its iron is what makes blood red, and having too little of it causes anaemia.","c":"round-6","s":"Science & Technology"},{"q":"What is the longest and strongest bone in the human body?","a":"The femur","w":"The femur, or thigh bone, runs from hip to knee and makes up roughly a quarter of a person's height. It can support many times the body's weight.","c":"round-6","s":"Science & Technology"},{"q":"Including wisdom teeth, how many teeth are in a full adult human set?","a":"32","w":"Adults have 32 teeth: 8 incisors, 4 canines, 8 premolars, and 12 molars, including the four wisdom teeth. Children have just 20 baby teeth.","c":"round-6","s":"Science & Technology"},{"q":"Which pair of organs filters waste from the blood and produces urine?","a":"The kidneys","w":"The kidneys filter the body's blood supply many times a day, processing roughly 180 litres of fluid and returning almost all of it. The waste leaves as about 1 to 2 litres of urine.","c":"round-6","s":"Science & Technology"},{"q":"What is the medical name for the voice box, which contains the vocal cords?","a":"The larynx","w":"Air passing over the vocal cords in the larynx makes them vibrate to produce sound. The bump known as the Adam's apple is the larynx's thyroid cartilage.","c":"round-6","s":"Science & Technology"},{"q":"Which coloured part of the eye controls how much light enters by changing the size of the pupil?","a":"The iris","w":"The iris is a ring of muscle that widens the pupil in dim light and narrows it in bright light. The amount of the pigment melanin in the iris determines eye colour.","c":"round-6","s":"Science & Technology"},{"q":"What is the longest river in Africa?","a":"The Nile","w":"The Nile flows north for about 6,650 kilometres through eleven countries before emptying into the Mediterranean Sea. Its annual floods sustained ancient Egyptian civilisation.","c":"round-6","s":"Geography"},{"q":"Which river carries more water to the sea than any other in the world?","a":"The Amazon","w":"The Amazon discharges more water than the next several largest rivers combined and drains about 40 percent of South America. By length it rivals the Nile, but by volume nothing comes close.","c":"round-6","s":"Geography"},{"q":"What is the highest mountain above sea level on Earth?","a":"Mount Everest","w":"Everest rises about 8,849 metres on the border of Nepal and China. Edmund Hillary and Tenzing Norgay made the first confirmed ascent in 1953.","c":"round-6","s":"Geography"},{"q":"What is the largest ocean on Earth?","a":"The Pacific Ocean","w":"The Pacific covers about a third of the planet's surface, more area than all the continents combined. Its floor holds the Mariana Trench, the deepest known point in the oceans.","c":"round-6","s":"Geography"},{"q":"Which continent is crossed by every line of longitude?","a":"Antarctica","w":"All meridians converge at the poles, and Antarctica surrounds the South Pole, so every line of longitude passes through it. It is also the coldest and driest continent.","c":"round-6","s":"Geography"},{"q":"The Great Barrier Reef, the world's largest coral reef system, lies off the coast of which country?","a":"Australia","w":"The reef stretches about 2,300 kilometres along Queensland's coast and is the largest structure on Earth built by living organisms, the work of billions of tiny coral polyps.","c":"round-6","s":"Geography"},{"q":"What is the smallest independent country in the world?","a":"Vatican City","w":"Vatican City covers only about 0.44 square kilometres, an enclave entirely inside Rome. It became a sovereign state under the 1929 Lateran Treaty and is home to St Peter's Basilica.","c":"round-6","s":"Geography"},{"q":"Which river flows through the centre of Paris?","a":"The Seine","w":"The Seine curves past landmarks including the Louvre and Notre-Dame, which stands on the Ile de la Cite, the island where Paris began. It reaches the sea at the English Channel.","c":"round-6","s":"Geography"},{"q":"Mount Kilimanjaro, the highest mountain in Africa, is located in which country?","a":"Tanzania","w":"Kilimanjaro rises 5,895 metres near Tanzania's border with Kenya. A dormant volcano, it is often called the world's tallest free-standing mountain because it climbs straight from the plains.","c":"round-6","s":"Geography"},{"q":"Which narrow strait separates Spain from Morocco and connects the Atlantic Ocean to the Mediterranean Sea?","a":"The Strait of Gibraltar","w":"At its narrowest the strait is only about 13 kilometres wide, so Europe and Africa are visible from each other's shores. In antiquity its flanking headlands were called the Pillars of Hercules.","c":"round-6","s":"Geography"},{"q":"What is the longest mountain range on land, running down the western side of South America?","a":"The Andes","w":"The Andes stretch about 7,000 kilometres through seven countries, from Venezuela to Chile and Argentina. Their highest peak, Aconcagua, is the tallest mountain outside Asia.","c":"round-6","s":"Geography"},{"q":"What salt lake between Israel and Jordan has the lowest land elevation on Earth?","a":"The Dead Sea","w":"Its shores lie more than 400 metres below sea level. The water is nearly ten times saltier than the ocean, which lets swimmers float effortlessly and keeps fish out, hence the name.","c":"round-6","s":"Geography"},{"q":"What is the name of the imaginary line at zero degrees latitude that divides Earth into the Northern and Southern Hemispheres?","a":"The Equator","w":"The Equator circles the planet for about 40,075 kilometres. Along it, day and night stay close to twelve hours each all year round.","c":"round-6","s":"Geography"},{"q":"In which Italian city is Shakespeare's 'Romeo and Juliet' set?","a":"Verona","w":"The prologue places the feuding Montagues and Capulets in 'fair Verona.' The city still draws visitors to a house with a balcony promoted as Juliet's.","c":"round-6","s":"History & Literature"},{"q":"Which Spanish author wrote 'Don Quixote,' often called the first modern novel?","a":"Miguel de Cervantes","w":"Published in two parts in 1605 and 1615, it follows a gentleman who reads too many tales of chivalry and sets out as a knight. His charge at windmills gave us the phrase 'tilting at windmills.'","c":"round-6","s":"History & Literature"},{"q":"Who wrote the novel 'Moby-Dick,' which opens with the line 'Call me Ishmael'?","a":"Herman Melville","w":"Melville published Moby-Dick in 1851, drawing on his own whaling voyages. The tale of Captain Ahab's obsession with the white whale sold poorly in his lifetime and was hailed as a masterpiece only decades later.","c":"round-6","s":"History & Literature"},{"q":"Which Russian author wrote 'War and Peace,' set during Napoleon's invasion of Russia?","a":"Leo Tolstoy","w":"Completed in 1869, War and Peace follows several aristocratic families through the Napoleonic Wars. At well over a thousand pages, its title has become shorthand for a very long book.","c":"round-6","s":"History & Literature"},{"q":"Who wrote 'Frankenstein,' a novel begun during a ghost-story contest on a rainy holiday at Lake Geneva?","a":"Mary Shelley","w":"Shelley began the story in 1816 at age 18 and published it in 1818. In the novel, Frankenstein is the name of the scientist, not the monster, which the book leaves unnamed.","c":"round-6","s":"History & Literature"},{"q":"Which American author won the Pulitzer Prize for 'The Old Man and the Sea,' about a Cuban fisherman's battle with a giant marlin?","a":"Ernest Hemingway","w":"The short novel, published in 1952, won the Pulitzer in 1953 and helped earn Hemingway the Nobel Prize in Literature in 1954. It was the last major work published in his lifetime.","c":"round-6","s":"History & Literature"},{"q":"Which author created the detective Sherlock Holmes?","a":"Arthur Conan Doyle","w":"Holmes first appeared in 'A Study in Scarlet' in 1887, sharing 221B Baker Street with Dr Watson. Doyle based the detective's methods partly on his medical school teacher Joseph Bell.","c":"round-6","s":"History & Literature"},{"q":"Which ancient Greek storyteller is credited with fables such as 'The Tortoise and the Hare' and 'The Boy Who Cried Wolf'?","a":"Aesop","w":"Aesop is said to have lived in Greece in the 6th century BC, traditionally as a slave. Each short animal tale ends in a moral, like 'slow and steady wins the race.'","c":"round-6","s":"History & Literature"},{"q":"Which French author wrote 'The Three Musketeers' and 'The Count of Monte Cristo'?","a":"Alexandre Dumas","w":"Both adventure classics appeared in the mid-1840s. The musketeers' motto, 'All for one and one for all,' is among the most quoted lines in French literature.","c":"round-6","s":"History & Literature"},{"q":"Which Russian novelist wrote 'Crime and Punishment,' about the tormented student Raskolnikov?","a":"Fyodor Dostoevsky","w":"Published in 1866 and set in St Petersburg, the novel follows a poor ex-student who murders a pawnbroker and is consumed by guilt. Dostoevsky wrote it while hounded by gambling debts.","c":"round-6","s":"History & Literature"},{"q":"Who wrote 'The Great Gatsby,' the 1925 novel of wealth and longing set in the Jazz Age?","a":"F. Scott Fitzgerald","w":"Narrated by Nick Carraway, the novel follows the mysterious millionaire Jay Gatsby on Long Island. It sold modestly at first but is now a leading candidate for the Great American Novel.","c":"round-6","s":"History & Literature"},{"q":"Who was the first person to walk on the Moon?","a":"Neil Armstrong","w":"Armstrong stepped onto the lunar surface on July 20, 1969, during the Apollo 11 mission, calling it 'one small step for man, one giant leap for mankind.' Buzz Aldrin followed him out minutes later.","c":"round-6","s":"History & Literature"},{"q":"In what year did World War II end?","a":"1945","w":"Germany surrendered in May 1945, and Japan announced its surrender that August after the atomic bombings, signing the formal documents on September 2. It remains history's deadliest conflict.","c":"round-6","s":"History & Literature"},{"q":"What is the name of the ancient Egyptian writing system that uses pictures and symbols?","a":"Hieroglyphics","w":"Hieroglyphs went unread for centuries until the Rosetta Stone, found in 1799, was seen to carry the same text in three scripts. Jean-Francois Champollion used it to crack the code in 1822.","c":"round-6","s":"History & Literature"},{"q":"In what year did the ocean liner Titanic sink on its maiden voyage?","a":"1912","w":"Titanic struck an iceberg late on April 14, 1912, sailing from Southampton to New York, and sank in the early hours of April 15. About 1,500 of the roughly 2,200 people aboard died.","c":"round-6","s":"History & Literature"},{"q":"In what year did the Berlin Wall fall?","a":"1989","w":"East Germany opened the wall on November 9, 1989, after weeks of mass protests, and jubilant crowds began tearing it down. It had divided Berlin since 1961, and Germany reunified within a year.","c":"round-6","s":"History & Literature"},{"q":"The storming of which Paris fortress-prison on July 14, 1789 marked the start of the French Revolution?","a":"The Bastille","w":"The crowd stormed the Bastille mainly to seize its gunpowder, freeing just seven prisoners held there at the time. July 14 is now France's national holiday, Bastille Day.","c":"round-6","s":"History & Literature"},{"q":"The eruption of which volcano in AD 79 buried the Roman city of Pompeii?","a":"Mount Vesuvius","w":"Vesuvius entombed Pompeii and neighbouring Herculaneum in ash, preserving streets, frescoes, and even loaves of bread. Pliny the Younger's eyewitness letters describe the eruption.","c":"round-6","s":"History & Literature"},{"q":"Which explorer led the expedition that first sailed around the world, though he was killed before it was completed?","a":"Ferdinand Magellan","w":"Magellan left Spain in 1519 with five ships but died in the Philippines in 1521. Just one ship, the Victoria, limped home in 1522 under Juan Sebastian Elcano, completing the circumnavigation.","c":"round-6","s":"History & Literature"},{"q":"Who was the last active ruler of ancient Egypt's Ptolemaic dynasty, famous for her alliances with Julius Caesar and Mark Antony?","a":"Cleopatra","w":"Cleopatra VII ruled for two decades before her death in 30 BC, after which Egypt became a Roman province. Her dynasty was Macedonian Greek, descended from a general of Alexander the Great.","c":"round-6","s":"History & Literature"},{"q":"Which Norwegian artist painted 'The Scream'?","a":"Edvard Munch","w":"Munch created the first version in 1893 and produced several more, inspired by a moment of dread during a sunset walk. The figure's wailing face became an emblem of modern anxiety.","c":"round-6","s":"The Arts"},{"q":"Which Dutch artist painted 'Girl with a Pearl Earring' around 1665?","a":"Johannes Vermeer","w":"Vermeer's portrait of an unknown girl in a turban is nicknamed the 'Mona Lisa of the North' and hangs in the Mauritshuis in The Hague. Only about three dozen Vermeer paintings survive.","c":"round-6","s":"The Arts"},{"q":"Which Spanish artist co-founded Cubism and painted 'Guernica,' a protest against the bombing of a Basque town?","a":"Pablo Picasso","w":"Picasso developed Cubism with Georges Braque in the years before World War I, then painted the mural-sized Guernica in 1937 during the Spanish Civil War. It became one of art's great anti-war statements.","c":"round-6","s":"The Arts"},{"q":"Which French sculptor created 'The Thinker'?","a":"Auguste Rodin","w":"The Thinker began around 1880 as part of Rodin's monumental doors 'The Gates of Hell,' where the pondering figure represented Dante. Bronze casts of it now sit in cities around the world.","c":"round-6","s":"The Arts"},{"q":"Which Surrealist artist painted 'The Persistence of Memory,' famous for its melting clocks?","a":"Salvador Dali","w":"Dali painted the small canvas in 1931 and said the drooping watches were partly inspired by soft Camembert cheese. It hangs in New York's Museum of Modern Art.","c":"round-6","s":"The Arts"},{"q":"Which French Impressionist is celebrated for his many paintings and pastels of ballet dancers?","a":"Edgar Degas","w":"Dancers appear in more than half of Degas's works, usually caught rehearsing or waiting rather than performing. His sculpture 'Little Dancer Aged Fourteen' scandalised critics in 1881.","c":"round-6","s":"The Arts"},{"q":"Which American artist painted 'American Gothic,' showing a stern farmer holding a pitchfork beside his daughter?","a":"Grant Wood","w":"Wood painted it in 1930 after spotting a small Iowa farmhouse with a Gothic window. His sister and his dentist posed for the figures, and it became one of America's most parodied images.","c":"round-6","s":"The Arts"},{"q":"In mathematics, what name is given to the ratio of a circle's circumference to its diameter?","a":"Pi","w":"Pi is approximately 3.14159 and is irrational, so its decimal digits go on forever without repeating. The approximation 3.14 is why March 14 is celebrated as Pi Day.","c":"round-6","s":"Mathematics"},{"q":"What do the three interior angles of any triangle on a flat plane add up to?","a":"180 degrees","w":"This holds for every triangle in flat, Euclidean geometry, whatever its shape. A quadrilateral's angles add up to 360 degrees, one full turn.","c":"round-6","s":"Mathematics"},{"q":"What is the smallest prime number?","a":"2","w":"Two is the only even prime, since every other even number is divisible by 2. The number 1 is excluded from the primes by definition.","c":"round-6","s":"Mathematics"},{"q":"What is the square root of 144?","a":"12","w":"Twelve times twelve is 144, a quantity known as a gross: a dozen dozens. Numbers like 144 with whole-number square roots are called perfect squares.","c":"round-6","s":"Mathematics"},{"q":"In Roman numerals, what number does the letter C represent?","a":"100","w":"C stands for the Latin 'centum,' meaning one hundred, the root of words like century, percent, and centurion. M is 1,000, D is 500, and L is 50.","c":"round-6","s":"Mathematics"},{"q":"How many sides does a hexagon have?","a":"Six","w":"The name comes from the Greek 'hex,' meaning six. Regular hexagons tile a surface perfectly with no gaps, which is why honeybees build hexagonal honeycomb cells.","c":"round-6","s":"Mathematics"},{"q":"The Pythagorean theorem, a squared plus b squared equals c squared, applies to which type of triangle?","a":"A right triangle","w":"It says the square of the hypotenuse equals the sum of the squares of the other two sides. The 3-4-5 triangle is the classic example, long used by builders to set square corners.","c":"round-6","s":"Mathematics"},{"q":"The Peace of Westphalia, which ended the Thirty Years' War in 1648, was negotiated in which two cities?","a":"Munster and Osnabruck","w":"Catholic powers negotiated at Munster and Protestant powers at Osnabruck, with couriers riding between the two. The settlement recognised state sovereignty and is treated as a founding moment of the modern international system.","c":"round-7","s":"Expert History"},{"q":"The 1774 Treaty of Kuchuk-Kainarji ended a six-year war between the Ottoman Empire and which rival power, then ruled by Catherine the Great?","a":"Russia","w":"The treaty gave Russia its first Black Sea ports and a vague right to speak for the sultan's Orthodox Christians. Russia invoked that clause for decades, and the dispute over it helped ignite the Crimean War in 1853.","c":"round-7","s":"Expert History"},{"q":"Which Roman emperor split imperial rule among four co-rulers in 293 AD, creating the system known as the Tetrarchy?","a":"Diocletian","w":"Diocletian divided power between two senior augusti, himself and Maximian, and two junior caesars, Galerius and Constantius. In 305 he became the first Roman emperor to abdicate voluntarily, retiring to his palace at Split, where he reportedly preferred growing cabbages to ruling.","c":"round-7","s":"Expert History"},{"q":"The Battle of Talas in 751 AD, which halted Chinese expansion into Central Asia, was fought between the Tang dynasty and which Arab caliphate?","a":"The Abbasid Caliphate","w":"Abbasid forces won after the Tang's Karluk allies switched sides mid-battle. Tradition holds that captured Chinese artisans carried papermaking to Samarkand, from where it spread across the Islamic world and on to Europe.","c":"round-7","s":"Expert History"},{"q":"Which Austrian foreign minister presided over the Congress of Vienna of 1814 to 1815, which redrew Europe's map after Napoleon's defeat?","a":"Klemens von Metternich","w":"Metternich engineered the Concert of Europe, a balance-of-power system that prevented a general European war for nearly forty years. The congress danced through months of negotiation even as Napoleon escaped Elba.","c":"round-7","s":"Expert History"},{"q":"The 1689 Treaty of Nerchinsk, the first treaty between Russia and Qing China, was drafted in Latin thanks to negotiators from which Catholic order?","a":"The Jesuits","w":"Jesuit missionaries Thomas Pereira and Jean-Francois Gerbillon served the Qing court as interpreters, making Latin the treaty's authoritative language. The agreement fixed the Amur frontier for about 170 years.","c":"round-7","s":"Expert History"},{"q":"Which secret 1916 agreement, named for a British and a French diplomat, divided the Ottoman Empire's Arab lands into spheres of influence?","a":"The Sykes-Picot Agreement","w":"Mark Sykes proposed a line 'from the e in Acre to the last k in Kirkuk.' Published by the Bolsheviks in 1917, the deal contradicted wartime promises of Arab independence and still shapes Middle Eastern borders.","c":"round-7","s":"Expert History"},{"q":"Which city was the capital of the Umayyad Caliphate from 661 until the Abbasid revolution of 750?","a":"Damascus","w":"From Damascus the Umayyads ruled an empire stretching from Spain to Central Asia. After their overthrow, the survivor Abd al-Rahman I fled to Iberia and founded an independent emirate at Cordoba in 756.","c":"round-7","s":"Expert History"},{"q":"Which 1713 treaty ended the War of the Spanish Succession and ceded Gibraltar to Britain?","a":"The Treaty of Utrecht","w":"Utrecht let Philip V keep the Spanish throne on condition it never unite with France's. Britain took Gibraltar and Minorca plus the asiento, the contract to supply enslaved Africans to Spanish America.","c":"round-7","s":"Expert History"},{"q":"At which battle in 1071 did the Seljuk sultan Alp Arslan capture the Byzantine emperor Romanos IV Diogenes?","a":"The Battle of Manzikert","w":"The defeat at Manzikert opened Anatolia to Turkish settlement, permanently shrinking Byzantium's heartland. The captured emperor was freed, then blinded by rivals on his return; the crisis fed the appeals that led to the First Crusade.","c":"round-7","s":"Expert History"},{"q":"Which ruler of the Mali Empire made a pilgrimage to Mecca in 1324 so lavish with gold that prices in Cairo were reportedly depressed for years?","a":"Mansa Musa","w":"The Arab historian al-Umari, visiting Cairo years later, recorded that Musa's spending was still blamed for cheapening gold. His wealth from the Bambuk and Bure goldfields made him a byword for the richest person in history.","c":"round-7","s":"Expert History"},{"q":"What name is given to the French civil wars of 1648 to 1653, fought against Cardinal Mazarin's government during the minority of Louis XIV?","a":"The Fronde","w":"Named for the slings Parisian crowds used to smash windows, the Fronde saw princes and parlements defy the crown. The humiliation marked the young Louis XIV, who later built Versailles partly to keep the nobility under his eye.","c":"round-7","s":"Expert History"},{"q":"What name is given to the Ottoman Empire's era of modernising reforms launched by the Edict of Gulhane in 1839?","a":"The Tanzimat","w":"Tanzimat means 'reorganisation.' The reforms promised legal equality regardless of religion, modern conscription, and new secular schools and courts, and culminated in the short-lived Ottoman constitution of 1876.","c":"round-7","s":"Expert History"},{"q":"Which Roman commander defeated Spartacus in 71 BC and crucified some 6,000 captured rebels along the Appian Way?","a":"Marcus Licinius Crassus","w":"Crassus, reputedly Rome's richest man, broke the revolt but saw Pompey claim credit for mopping up. He later joined Caesar and Pompey in the First Triumvirate and died at Carrhae in 53 BC invading Parthia.","c":"round-7","s":"Expert History"},{"q":"The Zimmermann Telegram of 1917 proposed a German wartime alliance with which country, offering it Texas, New Mexico, and Arizona?","a":"Mexico","w":"British codebreakers in Room 40 decrypted the message from foreign secretary Arthur Zimmermann. Its publication in the American press in March 1917 helped push the United States into the First World War the following month.","c":"round-7","s":"Expert History"},{"q":"What name is given to the 1830s migration of Dutch-speaking Boer farmers out of the British Cape Colony into the southern African interior?","a":"The Great Trek","w":"The Voortrekkers left in part over Britain's abolition of slavery and founded Natal, the Orange Free State, and the Transvaal. The migration later became the central myth of Afrikaner nationalism.","c":"round-7","s":"Expert History"},{"q":"Which Holy Roman Emperor stood as a penitent in the snow at Canossa in January 1077, seeking absolution from Pope Gregory VII?","a":"Henry IV","w":"Henry waited three days outside the castle gate to have his excommunication lifted during the Investiture Controversy. 'Going to Canossa' still means humiliating submission, and the truce failed: Gregory excommunicated him again.","c":"round-7","s":"Expert History"},{"q":"Which Mauryan emperor, remorseful after his bloody conquest of Kalinga around 261 BC, embraced Buddhism and proclaimed his principles on rock edicts across India?","a":"Ashoka","w":"Ashoka's Rock Edict XIII records his remorse at the roughly 100,000 killed in Kalinga. His edicts are among the oldest deciphered Indian inscriptions, and his lion capital is now the state emblem of India.","c":"round-7","s":"Expert History"},{"q":"Which Baltic city led the Hanseatic League, hosting the league's first general assembly in 1356?","a":"Lubeck","w":"Called the Queen of the Hanse, Lubeck sat at the neck of the Jutland peninsula and controlled trade between the Baltic and North Seas. Its town law was adopted by roughly a hundred member cities.","c":"round-7","s":"Expert History"},{"q":"In 1849 the Frankfurt Parliament offered the crown of a united Germany to which Prussian king, who contemptuously refused it?","a":"Frederick William IV","w":"He dismissed a crown offered by an elected assembly rather than by his fellow princes, privately deriding it as unworthy of a king by divine right. The refusal doomed the 1848 revolution's hope of unifying Germany from below.","c":"round-7","s":"Expert History"},{"q":"The House of Wisdom in Baghdad, where Greek science was translated into Arabic, flourished under which Abbasid caliph, who reigned from 813 to 833?","a":"Al-Ma'mun","w":"Al-Ma'mun sponsored translations of Aristotle, Ptolemy, and Euclid and patronised al-Khwarizmi, whose treatise on 'al-jabr' gave algebra its name. He even sent scholars out to measure a degree of the Earth's meridian.","c":"round-7","s":"Expert History"},{"q":"The 1887 Michelson-Morley experiment famously failed to detect Earth's motion through what hypothesised light-carrying medium?","a":"The luminiferous ether","w":"Their interferometer found no difference in light speed along or across Earth's motion, the most celebrated null result in physics. It undermined ether theory and prepared the ground for Einstein's special relativity in 1905.","c":"round-7","s":"Expert Science"},{"q":"Which physicist's gravestone in Vienna's Central Cemetery is engraved with the entropy formula S = k log W?","a":"Ludwig Boltzmann","w":"Boltzmann linked entropy to the number of microscopic arrangements of a system, founding statistical mechanics against fierce resistance. He died in 1906; the constant k in the formula now bears his name.","c":"round-7","s":"Expert Science"},{"q":"What is the designation of the 1952 X-ray diffraction image of DNA, taken in Rosalind Franklin's lab, whose X-shaped pattern revealed the double helix?","a":"Photo 51","w":"The image was taken by Raymond Gosling working under Franklin at King's College London. Maurice Wilkins showed it to James Watson without her knowledge, and Watson wrote that the sight set his pulse racing.","c":"round-7","s":"Expert Science"},{"q":"Which German meteorologist proposed continental drift in 1912, arguing that today's continents once formed a single supercontinent?","a":"Alfred Wegener","w":"Wegener marshalled matching coastlines, fossils, and rock strata, but was ridiculed for lacking a mechanism. Plate tectonics vindicated him in the 1960s, decades after he died on the Greenland ice sheet in 1930.","c":"round-7","s":"Expert Science"},{"q":"Which mathematician proved the theorem, published in 1918, that every continuous symmetry of physical law yields a conserved quantity?","a":"Emmy Noether","w":"Noether's theorem ties energy conservation to time symmetry and momentum conservation to space symmetry, a cornerstone of modern physics. Barred from a full professorship for years in Gottingen, she lectured under Hilbert's name.","c":"round-7","s":"Expert Science"},{"q":"In the Miller-Urey experiment of 1952, electric sparks passed through a simulated early atmosphere produced which class of biological building blocks?","a":"Amino acids","w":"Within days the flask at the University of Chicago yielded glycine and other amino acids from water, methane, ammonia, and hydrogen. The result founded experimental research into the chemical origin of life.","c":"round-7","s":"Expert Science"},{"q":"Which reclusive English scientist used a torsion balance in 1798 to measure the density of the Earth, in effect determining the gravitational constant?","a":"Henry Cavendish","w":"Cavendish measured the tiny attraction between lead spheres and got Earth's density within about one percent of the modern value. Famously shy, he had earlier discovered hydrogen, which he called 'inflammable air.'","c":"round-7","s":"Expert Science"},{"q":"What name did Stanley Prusiner coin in 1982 for infectious agents made only of misfolded protein, responsible for scrapie and Creutzfeldt-Jakob disease?","a":"Prions","w":"The word comes from 'proteinaceous infectious particle.' Infection without any nucleic acid was heresy until the evidence mounted, and Prusiner received an unshared Nobel Prize in 1997.","c":"round-7","s":"Expert Science"},{"q":"Which two Bell Labs physicists discovered the cosmic microwave background in 1965, after first blaming the noise on pigeon droppings in their antenna?","a":"Arno Penzias and Robert Wilson","w":"Their horn antenna at Holmdel, New Jersey picked up the same faint hiss from every direction: relic radiation from the hot early universe. The accidental discovery clinched the Big Bang theory and won the 1978 Nobel Prize.","c":"round-7","s":"Expert Science"},{"q":"Mendeleev's 1871 prediction of an element he called 'eka-aluminium' was vindicated in 1875 by the discovery of which element?","a":"Gallium","w":"Paul-Emile Lecoq de Boisbaudran found gallium spectroscopically, and its density and other properties matched Mendeleev's forecasts almost exactly. The triumph converted many skeptics to the periodic table.","c":"round-7","s":"Expert Science"},{"q":"Which spiral bacterium, proved by Barry Marshall and Robin Warren to cause stomach ulcers, did Marshall deliberately drink in 1984?","a":"Helicobacter pylori","w":"Marshall swallowed a culture, developed gastritis, and treated himself, demolishing the doctrine that ulcers came from stress and acid alone. He and Warren shared the 2005 Nobel Prize in Physiology or Medicine.","c":"round-7","s":"Expert Science"},{"q":"The buried Chicxulub crater, ground zero of the impact linked to the dinosaurs' extinction 66 million years ago, lies beneath which Mexican peninsula?","a":"The Yucatan Peninsula","w":"The roughly 180 km crater was identified from geophysical surveys originally made for oil exploration. A worldwide clay layer rich in iridium, flagged by Luis and Walter Alvarez in 1980, first pointed to an impact.","c":"round-7","s":"Expert Science"},{"q":"Alan Turing's 1936 paper 'On Computable Numbers' introduced an abstract machine to settle which decision problem posed by David Hilbert?","a":"The Entscheidungsproblem","w":"Turing proved no general algorithm can decide the truth of every mathematical statement. The paper's universal machine, able to simulate any other, became the theoretical blueprint for the stored-program computer.","c":"round-7","s":"Expert Science"},{"q":"Which logician proved in 1931 that any consistent formal system rich enough to express arithmetic must contain true statements it cannot prove?","a":"Kurt Godel","w":"Godel's incompleteness theorems shattered Hilbert's programme of grounding all mathematics on a provably complete foundation. Still in his mid-twenties when the paper appeared, he later became Einstein's walking companion at Princeton.","c":"round-7","s":"Expert Science"},{"q":"Which Hungarian physician showed in 1847 that handwashing in chlorinated lime slashed maternal deaths from childbed fever in Vienna's maternity clinic?","a":"Ignaz Semmelweis","w":"Mortality on the doctors' ward fell roughly tenfold once staff washed off cadaver particles before deliveries. Ridiculed and ignored, Semmelweis died in an asylum in 1865, two decades before germ theory proved him right.","c":"round-7","s":"Expert Science"},{"q":"What industrial process, first run at scale in 1913, synthesises ammonia from atmospheric nitrogen and now underpins fertiliser feeding roughly half of humanity?","a":"The Haber-Bosch process","w":"Fritz Haber demonstrated catalytic ammonia synthesis and Carl Bosch industrialised it at BASF. Often called the most consequential invention of the 20th century, it earned both men Nobel Prizes.","c":"round-7","s":"Expert Science"},{"q":"Which 375-million-year-old fossil fish with wrist-like bones in its fins, found on Canada's Ellesmere Island in 2004, marks the transition to four-limbed land animals?","a":"Tiktaalik","w":"Neil Shubin's team targeted Devonian rocks of exactly the right age and environment, and Tiktaalik roseae turned up where theory predicted. Its neck and sturdy fins could manage a push-up, earning it the nickname 'fishapod.'","c":"round-7","s":"Expert Science"},{"q":"What radiation, seen as an eerie blue glow around submerged reactor cores, is emitted when a charged particle moves through a medium faster than light does in that medium?","a":"Cherenkov radiation","w":"Pavel Cherenkov characterised the glow in the 1930s, sharing the 1958 Nobel Prize with theorists Ilya Frank and Igor Tamm. Neutrino observatories like Super-Kamiokande detect particles by their Cherenkov light cones in water.","c":"round-7","s":"Expert Science"},{"q":"Which geneticist discovered transposons, the 'jumping genes' of maize, and won an unshared Nobel Prize in 1983?","a":"Barbara McClintock","w":"McClintock showed in the 1940s that genetic elements can move and switch traits on and off, work so far ahead of its time that she largely stopped publishing on it. Transposons are now known to make up much of the human genome.","c":"round-7","s":"Expert Science"},{"q":"Which Greek scholar, head of the Library of Alexandria, calculated the Earth's circumference around 240 BC by comparing shadows at Syene and Alexandria?","a":"Eratosthenes","w":"Knowing the solstice sun stood overhead at Syene while casting a measurable shadow at Alexandria, he derived a circumference close to the true 40,000 km. He also invented a prime-number sieve still taught today.","c":"round-7","s":"Expert Science"},{"q":"Which strait, whose Arabic name means 'Gate of Tears,' connects the Red Sea to the Gulf of Aden?","a":"The Bab-el-Mandeb","w":"The Bab-el-Mandeb separates Yemen from Djibouti and Eritrea and is one of the world's busiest oil chokepoints. Its ominous name is traditionally ascribed to the dangers of its currents and reefs.","c":"round-7","s":"Expert Geography"},{"q":"Which Siberian lake is the deepest on Earth and holds roughly one-fifth of the planet's unfrozen fresh surface water?","a":"Lake Baikal","w":"Baikal reaches 1,642 metres deep and sits in the world's deepest continental rift, which is still widening. Its isolation has produced hundreds of endemic species, including the world's only exclusively freshwater seal.","c":"round-7","s":"Expert Geography"},{"q":"Which southern African river never reaches the ocean, instead ending in a vast inland delta in Botswana's Kalahari?","a":"The Okavango","w":"The Okavango rises in the Angolan highlands and fans into a delta of some 15,000 square km that floods during Botswana's dry season, sustaining huge wildlife concentrations. Its water finally vanishes by evaporation and transpiration.","c":"round-7","s":"Expert Geography"},{"q":"Which narrow Afghan panhandle, delimited in the 1890s as a buffer between the Russian and British empires, gives Afghanistan a short border with China?","a":"The Wakhan Corridor","w":"The corridor, in places barely 15 km wide, was assigned to Afghanistan so the two rivals of the Great Game would never share a frontier. At its far end lies the short Afghan-Chinese border, under 100 km long and one of the world's shortest.","c":"round-7","s":"Expert Geography"},{"q":"Which desert in northern Chile is the driest non-polar place on Earth, where some weather stations have never recorded rainfall?","a":"The Atacama Desert","w":"Blocked by the Andes and the Chilean Coast Range and chilled by the Humboldt Current, parts of the Atacama receive less than 1 mm of rain a year. Its sterile soils are used by NASA to test instruments bound for Mars.","c":"round-7","s":"Expert Geography"},{"q":"The Danube flows through four national capitals, more than any other river: Vienna, Budapest, Belgrade, and which other?","a":"Bratislava","w":"Bratislava, the capital of Slovakia, lies only about 60 km from Vienna, one of the closest pairs of national capitals in the world. The Danube then passes Budapest and Belgrade before reaching its Black Sea delta.","c":"round-7","s":"Expert Geography"},{"q":"Soviet irrigation schemes that drained which two rivers caused the Aral Sea to shrink to a fraction of its former size?","a":"The Amu Darya and the Syr Darya","w":"From the 1960s their water was diverted to cotton fields, and the world's fourth-largest lake split into shrinking, hypersaline remnants. The exposed seabed, now called the Aralkum, generates toxic dust storms.","c":"round-7","s":"Expert Geography"},{"q":"Which African Great Lake, the longest freshwater lake in the world, is shared by Tanzania, the Democratic Republic of the Congo, Burundi, and Zambia?","a":"Lake Tanganyika","w":"Tanganyika stretches about 670 km and is the world's second-deepest lake after Baikal. Its ancient waters host hundreds of endemic cichlid fish species, a textbook case of adaptive radiation.","c":"round-7","s":"Expert Geography"},{"q":"Which strait between the Malay Peninsula and the island of Sumatra carries roughly a quarter of the world's seaborne trade?","a":"The Strait of Malacca","w":"The strait is the shortest sea route between the Indian and Pacific Oceans, narrowing to under 3 km near Singapore. Ships too large for it are rated post-Malaccamax and must detour through Indonesian straits.","c":"round-7","s":"Expert Geography"},{"q":"Russia's Baltic exclave capital Kaliningrad went by what German name until 1946, when it had long been home to the philosopher Immanuel Kant?","a":"Konigsberg","w":"Konigsberg was East Prussia's capital for centuries, and its seven bridges inspired Euler to found graph theory. Annexed by the USSR in 1945, it was renamed for the Soviet official Mikhail Kalinin.","c":"round-7","s":"Expert Geography"},{"q":"What name is given to the boundary agreed in 1893 between British India and Afghanistan, still the contested frontier between Afghanistan and Pakistan?","a":"The Durand Line","w":"Negotiated by Sir Mortimer Durand and Amir Abdur Rahman Khan, the line runs about 2,600 km and cuts through Pashtun lands. No Afghan government has ever formally recognised it as an international border.","c":"round-7","s":"Expert Geography"},{"q":"The Blue Nile, source of most of the Nile's floodwater, rises from which large Ethiopian lake?","a":"Lake Tana","w":"From Lake Tana the Blue Nile drops over the Blue Nile Falls and through a mile-deep gorge before joining the White Nile at Khartoum. In flood season it supplies the great majority of the combined river's water.","c":"round-7","s":"Expert Geography"},{"q":"By what ancient name was the strait now called the Dardanelles known, famously swum by Leander in myth and by Lord Byron in 1810?","a":"The Hellespont","w":"In myth Leander swam the Hellespont nightly to reach Hero, and Xerxes bridged it with boats to invade Greece in 480 BC. Byron swam it to prove the feat possible and boasted of the exploit in verse.","c":"round-7","s":"Expert Geography"},{"q":"The Pamir Mountains, known historically as the 'Roof of the World,' lie mostly within which Central Asian country?","a":"Tajikistan","w":"The Pamirs fill Tajikistan's Gorno-Badakhshan region, with peaks above 7,000 metres including Ismoil Somoni Peak, once Communism Peak. The range knots together the Hindu Kush, Karakoram, and Tian Shan.","c":"round-7","s":"Expert Geography"},{"q":"Which South Atlantic island group, whose only settlement is Edinburgh of the Seven Seas, is the most remote inhabited archipelago on Earth?","a":"Tristan da Cunha","w":"Tristan lies about 2,400 km from Saint Helena and 2,800 km from South Africa, reachable only by ship. A 1961 volcanic eruption forced the entire population to England; most chose to return two years later.","c":"round-7","s":"Expert Geography"},{"q":"In Dante's Divine Comedy, which Roman poet guides Dante through Hell and most of Purgatory?","a":"Virgil","w":"As a virtuous pagan, Virgil can go no further than the Earthly Paradise, where Beatrice takes over for the ascent to Heaven. Dante's choice honoured the Aeneid, the model for his own epic.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Johannes Vermeer spent his whole career in which Dutch city, the subject of one of his only two surviving cityscapes?","a":"Delft","w":"Vermeer lived and died in Delft, leaving fewer than 40 accepted paintings. His View of Delft so overwhelmed Marcel Proust that he called it the most beautiful painting in the world.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Cervantes rushed out the genuine second part of Don Quixote in 1615 partly in response to a fake sequel published a year earlier under which pseudonym?","a":"Alonso Fernandez de Avellaneda","w":"The impostor's identity has never been established. Cervantes took revenge inside his own Part Two, having characters denounce the false book, and even sent his hero to Barcelona instead of Zaragoza to contradict it.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Hokusai's print The Great Wave off Kanagawa belongs to which celebrated series named for Japan's sacred mountain?","a":"Thirty-six Views of Mount Fuji","w":"Hokusai began the series around 1830, aged about 70, and its success added ten designs beyond the promised 36. The wave's deep colour relies on Prussian blue, a pigment newly imported from Europe.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Which Mesopotamian epic, recovered from clay tablets in Ashurbanipal's library at Nineveh, contains a flood narrative predating the Genesis account?","a":"The Epic of Gilgamesh","w":"When George Smith deciphered the flood tablet in 1872 he reportedly leapt up in excitement and began undressing. The poem follows Gilgamesh of Uruk and his friend Enkidu on a quest that ends as a meditation on mortality.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Picasso's mural Guernica responded to the April 1937 destruction of the Basque town of Guernica by bombers of which two countries?","a":"Germany and Italy","w":"The German Condor Legion, joined by Italian aircraft, bombed the town for Franco during the Spanish Civil War. Picasso painted the vast canvas in weeks for the Paris International Exposition; it reached Spain only in 1981.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Which Japanese court work of the early 11th century, written by the lady-in-waiting Murasaki Shikibu, is often called the world's first novel?","a":"The Tale of Genji","w":"The Tale of Genji follows the loves of the Shining Prince across more than fifty chapters of Heian court life. Written a millennium ago, its psychological depth still astonishes; Virginia Woolf reviewed Arthur Waley's celebrated English translation.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Herman Melville dedicated Moby-Dick in 1851 'in token of my admiration for his genius' to which fellow American novelist?","a":"Nathaniel Hawthorne","w":"Melville met Hawthorne in 1850 while writing the book, and the friendship pushed it toward something darker and more ambitious. Moby-Dick flopped on publication and was only rediscovered in the 1920s.","c":"round-7","s":"Expert Culture & Arts"},{"q":"About 25 years after finishing the Sistine ceiling, Michelangelo returned to paint which vast fresco on the chapel's altar wall, completed in 1541?","a":"The Last Judgment","w":"The nudity scandalised churchmen, and after Michelangelo's death Daniele da Volterra was hired to add draperies, earning the nickname Il Braghettone, the breeches-maker. Michelangelo painted his own face on a flayed skin.","c":"round-7","s":"Expert Culture & Arts"},{"q":"James Joyce set Ulysses on a single Dublin day. What exact date, now celebrated worldwide as Bloomsday?","a":"June 16, 1904","w":"Joyce chose the date of his first outing with Nora Barnacle, his future wife. Fans retrace Leopold Bloom's route through Dublin every June 16.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Bernini's sculpture The Ecstasy of Saint Teresa occupies the Cornaro Chapel of which church in Rome?","a":"Santa Maria della Vittoria","w":"Bernini staged the saint's vision as theatre, lighting the marble group from a hidden window and carving the Cornaro family watching from balcony boxes. It is often called the summit of Roman Baroque sculpture.","c":"round-7","s":"Expert Culture & Arts"},{"q":"In which fictional town does the Buendia family saga of Gabriel Garcia Marquez's One Hundred Years of Solitude unfold?","a":"Macondo","w":"Marquez modelled Macondo partly on his birthplace of Aracataca, Colombia. The novel sold tens of millions of copies, led the Latin American Boom, and helped earn him the 1982 Nobel Prize in Literature.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Rembrandt's 1642 group portrait The Night Watch depicts an Amsterdam civic militia company under which captain?","a":"Frans Banninck Cocq","w":"The captain in black and his lieutenant in yellow stride out of the canvas, revolutionising the static group portrait. Darkened varnish earned it the nickname Night Watch in the 18th century, though the scene is daytime.","c":"round-7","s":"Expert Culture & Arts"},{"q":"What is the title of Beethoven's only opera, a rescue drama premiered in 1805 and reaching its final form in 1814?","a":"Fidelio","w":"The heroine Leonore disguises herself as the youth Fidelio to free her husband from a political prison. Beethoven laboured over the work for a decade, writing four different overtures along the way.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Which French scholar announced the decipherment of Egyptian hieroglyphs in 1822, cracking the script with the Rosetta Stone and his knowledge of Coptic?","a":"Jean-Francois Champollion","w":"Champollion realised the script mixed phonetic and symbolic signs, reading royal names such as Ramesses to prove it. On grasping the solution he reportedly ran to his brother's office, cried 'Je tiens l'affaire!' and fainted.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Chinua Achebe took the title of his 1958 novel Things Fall Apart from which W.B. Yeats poem?","a":"The Second Coming","w":"Yeats's 1919 poem supplies the epigraph: 'Things fall apart; the centre cannot hold.' Achebe's novel of Igbo society meeting colonialism became the most widely read African novel, translated into some 60 languages.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Kabuki theatre originated around 1603 with the performances of which female shrine attendant, though women were later banned from its stage?","a":"Izumo no Okuni","w":"Okuni, said to be a miko of the Izumo Grand Shrine, staged sensational dance-dramas on a dry riverbed in Kyoto. The shogunate banned women from kabuki in 1629, and all roles passed to male actors, the onnagata tradition.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Which 1432 polyptych by Hubert and Jan van Eyck, centred on the Adoration of the Mystic Lamb, is often called the most frequently stolen artwork in history?","a":"The Ghent Altarpiece","w":"Its panels have been seized by Napoleon's France, sold off, looted by the Nazis, and rescued from an Austrian salt mine in 1945. The Just Judges panel, stolen in 1934, has never been recovered.","c":"round-7","s":"Expert Culture & Arts"},{"q":"Wagner built which purpose-designed theatre, opened in 1876, to stage the first complete performance of his Ring cycle?","a":"The Bayreuth Festspielhaus","w":"Wagner sank the orchestra into a hooded pit beneath the stage, hiding the players and blending the sound. The theatre still hosts the annual Bayreuth Festival, where ticket waits famously ran to many years.","c":"round-7","s":"Expert Culture & Arts"}]}