80 Fun Facts About Trivia Facts

Which food, properly stored, essentially never spoils, with samples from ancient tombs still edible?

Honey keeps almost indefinitely: its low water content, high sugar concentration and acidity stop microbes growing, which is why archaeologists have found sealed jars of honey in Egyptian tombs still edible.

On which planet does a single day (one rotation) last longer than its year?

Venus takes about 243 Earth days to spin once on its axis but only about 225 to circle the Sun, so its day outlasts its year; it also spins retrograde.

Which everyday fruit is radioactive enough to serve as an informal unit of radiation dose?

The 'banana equivalent dose' comes from naturally occurring potassium-40, and eating one is worth roughly 0.1 microsieverts.

The air around a lightning bolt heats to roughly what temperature?

A lightning channel heats the surrounding air to roughly 30,000 °C, about five times the temperature of the Sun's surface; the air's explosive expansion is what we hear as thunder.

On a hot day, the top of the Eiffel Tower can lean away from the sun by up to how much?

Heat makes the sunlit side of the Eiffel Tower's iron expand more than the shaded side, so the whole tower bends away from the sun, its top shifting by up to 18 cm.

Which microscopic animals have survived direct exposure to the vacuum of outer space?

Tardigrades, also called water bears, survived ten days exposed to open space on the 2007 FOTON-M3 mission; they curl into a dried-out 'tun' state that shrugs off vacuum, radiation and near-absolute-zero cold.

Which planet is the only one in the Solar System less dense than water?

Saturn's average density is about 0.69 grams per cubic centimetre, below water's 1.0, so in a big enough bathtub it would in theory float; every other planet is denser than water.

Which planet's position was worked out mathematically before anyone had knowingly seen it?

Neptune's position was calculated by Urbain Le Verrier, and independently John Couch Adams, from wobbles in Uranus's orbit; Johann Galle found Neptune within a degree of Le Verrier's prediction in September 1846.

Pluto, discovered in 1930, will complete its first full orbit since its discovery in which year?

Pluto's orbit takes about 248 Earth years, so having been discovered in 1930 it completes its first full circuit since then in 2178, nearly a quarter-millennium after Clyde Tombaugh spotted it.

If all the gold ever mined were melted into a single cube, roughly how long would each side be?

All the gold ever mined would form a cube only about 22 metres on each side; gold is so dense, 19.3 tonnes per cubic metre, that the whole historic total fits comfortably inside a stadium.

Up to how long can a sloth hold its breath underwater?

A sloth can hold its breath for up to 40 minutes by slowing an already sluggish heart rate to less than a third of normal; sloths are surprisingly capable swimmers.

What gives flamingos their pink colour?

Their food does it: flamingo chicks hatch grey and turn pink from carotenoid pigments in the algae and brine shrimp they eat, which is why zoo birds fade without supplements.

To stop themselves drifting out to sea while resting, sea otters wrap themselves in what?

Sea otters wrap themselves in strands of kelp before sleeping so they do not drift off; mothers also wrap their pups in kelp while diving for food, and the pup cries if it wakes alone.

Which bird's wing structure allows helicopter-like flight in any direction, including backwards and hovering?

Hummingbirds rotate their wings at the shoulder to generate lift on both the forward and backward stroke, which lets them hover and fly backwards; their wings beat up to about 80 times a second.

Which Mexican salamander can regrow lost limbs, gills and even parts of its brain?

The axolotl can regrow limbs, gills, spinal cord, jaw and parts of its brain without scarring; its 32-billion-base-pair genome was, when first published, the largest animal genome ever sequenced.

The peacock mantis shrimp strikes with an acceleration of roughly how many g?

Sheila Patek's high-speed footage measured the peacock mantis shrimp's club at about 10,400 g, reaching roughly 83 km/h; the strike creates cavitation bubbles whose collapse delivers a second blow, and clubs have cracked aquarium glass.

In which animal does the male carry the developing eggs and give birth?

Seahorse females deposit eggs in a brood pouch on the front of the male's tail; he fertilises and carries them for two to four weeks, then gives birth to fully formed young.

Which animal has the longest known lifespan of any vertebrate, estimated at 272 years or more?

The Greenland shark is the longest-lived vertebrate known: radiocarbon dating of eye-lens proteins put the oldest sampled female at about 392 years, give or take 120, so at least 272.

Which birds have been shown to recognise and remember individual human faces?

Crows recognise and remember individual human faces: in John Marzluff's Seattle experiments, crows trapped by people wearing a 'dangerous' mask scolded that mask for years afterwards and taught others to do the same.

What colour is a polar bear's skin under its fur?

A polar bear's skin is black, which helps it absorb warmth; the fur only looks white because its transparent, hollow guard hairs scatter visible light.

Which birds cannot move their eyes at all and must turn their whole head instead?

Owls' eyes are fixed in bony tubes called sclerotic rings, so they cannot swivel them; instead extra neck vertebrae let an owl turn its head most of the way round.

Where are a butterfly's taste receptors located?

A female uses them to test whether a leaf will feed her caterpillars before she lays eggs on it.

Which university's teaching is first documented in 1096, making it older than the Aztec Empire?

Oxford has evidence of teaching from 1096, making it the oldest university in the English-speaking world; the Aztec Empire, by contrast, was founded in 1428.

How many deaths were officially recorded in the 1666 Great Fire of London?

Only a few deaths, traditionally six, were recorded in the Great Fire of 1666, though some historians think the true toll was higher because poorer victims went unrecorded.

According to legend, which Roman emperor planned to make his horse Incitatus a consul?

Suetonius says the horse had a marble stable, an ivory manger and purple blankets, though ancient sources agree the consulship never actually happened.

As a young man, Julius Caesar was kidnapped and held for ransom by whom?

Cilician pirates seized Caesar near Pharmacusa around 75 BC; Plutarch says he joked he would return and crucify them, then did exactly that once the ransom was paid.

In 1698, Tsar Peter I of Russia introduced a tax on what?

Peter the Great's 1698 beard tax was part of his drive to make Russia look Western European; men who paid for the right to keep their beards received a copper token as proof.

The last woolly mammoths survived until about 4,000 years ago where?

The last woolly mammoths lived on Wrangel Island off Siberia until about 4,000 years ago, which is after the Great Pyramid of Giza was built, so mammoths and pharaohs overlapped in time.

In 1859, San Francisco resident Joshua Norton proclaimed himself what?

Joshua Norton declared himself Emperor of the United States in September 1859; San Francisco played along for two decades, restaurants took his own banknotes and some 10,000 people attended his 1880 funeral.

How many human casualties did the 1859 US–British 'Pig War' over the San Juan Islands have?

The only casualty was the pig, shot by an American farmer after it rooted through his potatoes on land both nations claimed.

Vespasian's tax on what gave rise to the saying 'money does not stink'?

Urine collected from public toilets was valuable to tanners and launderers, and when his son objected, Vespasian held a coin to his nose.

In October 1814 a burst vat flooded the streets of St Giles, London, with what?

A vat of porter at the Horse Shoe Brewery burst on 17 October 1814, releasing between 128,000 and 323,000 imperial gallons of beer into St Giles and killing eight people.

How many time zones does Russia span?

They run from UTC+2 in Kaliningrad to UTC+12 in Kamchatka, so New Year arrives eleven separate times.

Which US state is, by longitude, both the westernmost and the easternmost?

Alaska's Aleutian Islands stretch across the 180th meridian into the Eastern Hemisphere, making it the easternmost as well as the westernmost state; it is also the northernmost.

Which European country was essentially free of mosquitoes until 2025?

Iceland had no established mosquitoes: repeated freezes and thaws stopped the insects completing a life cycle, until the first specimens, of the species Culiseta annulata, were confirmed there in October 2025.

The summit of which mountain is the farthest point on Earth's surface from the planet's centre?

Chimborazo, a 6,263-metre volcano in Ecuador, sits on the equatorial bulge, so its summit is about 2 km farther from Earth's centre than Everest's despite being roughly 2,600 metres lower.

At Point Nemo, the most remote spot in the ocean, the nearest humans are sometimes who?

Point Nemo lies about 2,700 km from the nearest land, so when the International Space Station passes overhead at roughly 400 km up, its astronauts are the closest humans.

Which is the smallest sovereign state by both area and population, with under 1,000 people?

Vatican City covers just 44 hectares and has a population of under 1,000, mostly clergy and Swiss Guards, small enough to walk around its outer wall in well under an hour.

Which continent is mainly classed as a desert despite being covered in ice?

Antarctica counts as a desert because its interior receives barely 5 cm of precipitation a year, far below the 250 mm desert threshold; at 14 million square kilometres it is about 40% larger than Europe.

Botanically, what is the peanut, which is not a true nut?

The peanut is a legume, in the same family as peas and beans; its pods develop underground, which is why Linnaeus named it Arachis hypogaea, 'under the earth'.

The cashew nut grows attached to the bottom of what?

The reddish-yellow accessory fruit is juicy and edible in its own right and is fermented into liquor in Brazil and Goa.

What is missing from white chocolate that other chocolate contains?

White chocolate contains no cocoa solids, only cocoa butter, sugar and milk, which is why US regulators refused to call it chocolate until a standard was adopted in the 2000s.

Immigrants from which country most likely originated the fortune cookie?

The Japanese version was eaten with tea and had no lucky numbers; the cookies were popularised in California in the early 20th century.

John Pemberton's original 1886 cola recipe contained caffeine and which other stimulant?

Cocaine from coca-leaf extract was in John Pemberton's original 1886 Coca-Cola alongside caffeine from kola nuts, the two ingredients behind the name; one estimate puts it at about nine milligrams a glass.

Which common kitchen spice contains myristicin, a compound that is toxic and psychoactive in large doses?

Nutmeg's myristicin is harmless in a pinch, but eating a whole nutmeg or more can bring hours of nausea, dizziness and hallucinations, which gave the spice a folk reputation as a drug.

Between 1912 and 1948, the Olympic Games awarded medals in which unexpected category?

Art competitions ran at the Olympics from 1912 to 1948: architecture, literature, music, painting and sculpture each awarded medals, a set nicknamed the 'Pentathlon of the Muses'.

How many Olympic medals did swimmer Michael Phelps win in his career?

Michael Phelps won 28 Olympic medals between 2004 and 2016, 23 of them gold, a total greater than most countries have managed in their entire Olympic history.

The Tour de France leader's jersey is yellow most probably because of what?

L'Auto, which ran the race, was printed on yellow newsprint, and its editor handed out the first one in 1919.

Which astronaut hit two golf balls on the Moon during Apollo 14?

Alan Shepard smuggled a six-iron head that fitted onto a sample-scoop handle and, swinging one-handed in the stiff suit, hit two balls on 6 February 1971 during Apollo 14.

Why did the 1908 London Olympic marathon add the odd extra 385 yards?

The 1908 course ran 26 miles from Windsor Castle to the stadium, then a partial lap so runners finished in front of the Royal Box; that 26 miles 385 yards was standardised in 1921.

What did James Naismith nail up as the first ever basketball hoops in 1891?

Naismith nailed two peach baskets to the gym balcony at Springfield, Massachusetts, in December 1891; the baskets kept their bottoms at first, so the ball had to be fetched out after every score.

Which sport appeared at the Summer Olympics from 1900 to 1920 and was then dropped?

Tug of war was an Olympic sport from 1900 to 1920, contested by teams of eight; Great Britain, represented largely by police teams such as the City of London Police, won the most medals.

Which creature was Grace Hopper's team's 'first actual case of bug' found in 1947?

A moth was found stuck in relay 70 of the Harvard Mark II on 9 September 1947; the team taped it into the logbook, now held by the Smithsonian, as the 'first actual case of bug being found'.

Nintendo was founded in 1889 to make what?

Fusajiro Yamauchi founded Nintendo in Kyoto in 1889 to make handmade hanafuda playing cards; the company kept producing cards through the twentieth century, long before its first video games.

Nokia, later famous for phones, was originally established in 1865 as what?

Fredrik Idestam opened a wood-pulp mill at Tammerkoski in 1865, the seed of Nokia; it spent a century in paper, rubber boots and cables before phones, and at its 2000 peak was about 4% of Finland's GDP.

Bluetooth technology is named after whom?

Harald Bluetooth united Denmark and Norway, and the logo combines his initials in runes.

The world's first webcam, set up at Cambridge University in 1991, was pointed at what?

The Trojan Room coffee pot at Cambridge's computer lab was watched by a camera from 1991 so researchers could see whether it was empty before walking over; it went on the web in 1993.

When Jeff Bezos founded his online bookstore in 1994, what was it originally called?

He changed it after a lawyer misheard 'Cadabra' as 'cadaver', and picked a name that would come first alphabetically.

On Sesame Street, what colour was Oscar the Grouch during the show's first season?

Oscar the Grouch was orange in Sesame Street's first season (1969) and turned green from season two, a change the show explained as the result of a holiday at Swamp Mushy Muddy.

What did Psycho (1960) show for the first time in a mainstream American film?

Marion flushes a torn-up note, and toilets were almost never seen in American cinema at the time.

The 'Wilhelm scream', a stock sound effect used in hundreds of films, comes from which 1951 movie?

The scream was recorded for Distant Drums (1951), where a soldier is dragged under by an alligator; it was later named after Private Wilhelm, who screams it in the 1953 western The Charge at Feather River.

Wayne Allwine, Disney's Mickey voice for over 30 years, was married to the voice of whom?

Russi Taylor, the voice of Minnie Mouse from 1986, met Allwine at a recording session in 1988; they married in 1991 and stayed together until his death in 2009.

What is Barbie's full name, according to the 1960s Random House novels?

Barbie is Barbara Millicent Roberts in the Random House novels; her parents are George and Margaret Roberts of Willows, Wisconsin, and her boyfriend Ken is Kenneth Sean Carson.

What was the working title of 'Yesterday' while Paul McCartney was writing it in 1965?

McCartney woke with the tune in his head in 1965 and sang 'Scrambled eggs, oh my baby how I love your legs' as placeholder lyrics until the real words arrived.

Warner Chappell repaid $14 million in 2016 after losing its copyright claim to which song?

Warner/Chappell's claim to Happy Birthday to You collapsed in 2015 when a court found the 1935 copyright covered only a piano arrangement; the 2016 settlement repaid $14 million and placed the song in the public domain.

Which band failed a 1962 audition for Decca Records, which signed Brian Poole and the Tremeloes instead?

The Beatles auditioned for Decca on 1 January 1962 and were turned down, Brian Epstein reportedly being told guitar groups were on the way out; they signed with EMI's Parlophone that June.

Recording 'Bohemian Rhapsody' across eight generations of 24-track tape needed nearly how many tracks for overdubs?

Bohemian Rhapsody needed around 180 vocal overdubs, close to 200 tracks bounced across generations of 24-track tape; the tapes were reportedly so worn that they were almost transparent.

Green Eggs and Ham was written on a bet to use only how many distinct words?

Bennett Cerf bet Dr. Seuss $50 that he could not write a book with only 50 different words; Green Eggs and Ham (1960) uses exactly 50, and Cerf reportedly did not pay up.

Which novelist has sold more than two billion books, making her the best-selling novelist of all time?

Agatha Christie's 66 detective novels and 14 short-story collections have sold an estimated two billion copies; Guinness World Records lists her as the best-selling fiction writer ever, behind only the Bible and Shakespeare.

How often does Holmes say 'Elementary, my dear Watson' in Conan Doyle's sixty stories?

Holmes never says 'Elementary, my dear Watson' in the sixty stories; he says 'elementary' and 'my dear Watson' separately, and the full line was popularised by stage and film adaptations, including the 1929 film The Return of Sherlock Holmes.

How old was Mary Shelley when she began writing 'Frankenstein'?

Mary Shelley was 18 when the ghost-story contest at Villa Diodati on Lake Geneva in the rainy summer of 1816 sparked Frankenstein; it was published anonymously in 1818, when she was 20.

A 2014 study estimated the human nose can distinguish roughly how many different odours?

Bushdid and colleagues reported in Science in 2014 that humans can discriminate at least 1 trillion odours; the old textbook figure of 10,000 came from impressionistic 1920s work, though the new estimate has itself been challenged.

Roughly how much does a fingernail grow in a month?

Fingernails grow about 3.5 mm a month, roughly a tenth of a millimetre a day, so a nail takes around six months to regrow fully; toenails grow at about half that rate.

A human baby is born with roughly how many bones?

A newborn has roughly 270 bones, many of them still cartilage; as the child grows, bones such as those of the skull and spine fuse, leaving an adult with about 206.

Christopher Cockerell worked out the hovercraft principle using a hairdryer and two tin cans that had held what?

Cockerell nested a Kit-e-Kat cat-food tin inside a coffee tin and blew a hairdryer through them: the ring of fast air trapped a cushion, the key to a practical craft, and the SR.N1 crossed the Channel in 1959.

The word 'bus' owes its existence partly to an 1820s shop sign belonging to a French tradesman of what kind?

Stanislas Baudry's horse-drawn service in Nantes stopped outside a hatter named Omnés, whose punning sign read 'Omnes Omnibus', and the nickname stuck.

In 1840s Vienna, an ancestor of the Spirograph drawing toy was built to help prevent what?

Peter Hubert Desvignes, working in Vienna in the 1840s, built a machine that drew near-endless roulette patterns to defeat banknote forgery, since the curves were extremely hard to copy; Denys Fisher's Spirograph toy arrived in 1965.

The name of the block-stacking game Jenga means 'to build' in which language?

Jenga comes from the Swahili verb kujenga, 'to build'; creator Leslie Scott grew up speaking Swahili in Tanganyika, and her family's first blocks came from a sawmill in Takoradi, Ghana.

A 2015 study put the number of trees on Earth at roughly how many?

Thomas Crowther's 2015 study in Nature estimated about 3 trillion trees on Earth, eight times earlier estimates; it also reckoned humans felled some 15 billion a year against 5 billion planted.

Tortoises cannot swim, yet they have been known to survive ocean crossings of more than how far?

In 2004 an Aldabra giant tortoise washed ashore alive in Tanzania after drifting at least 740 km from Aldabra atoll; tortoises can float for weeks without food or fresh water, which is how they colonised islands.