Free Random Fun Facts Generator
A random fun facts generator serves up surprising, true facts one at a time. This one draws from 132 weird and wonderful facts, and every fact has a source you can check, plus a Real or Fake? mode with 34 viral fake facts.
Fact of the day
Loading today's fact...
Pick your mix
132 facts in this mix. Kids and Classroom use kid-safe facts only; Office icebreaker uses the lightest ones.
Fact 1 of 132
SpaceThe Moon is slowly moving away from Earth, about an inch farther each year.
Why it's true: NASA reports the gradual drift as part of the Earth-Moon system's long-term evolution.
Real or Fake?
Ten statements. Some are real, sourced facts and some are viral fake facts people share all the time. Decide which is which, then see the explanation, where the myth came from, and a source.
Your category and audience picks apply to the round.
How it works
How to use the Random Fun Facts Generator
- 01
Pick categories and an audience: All, Kids, Classroom, or Office icebreaker.
- 02
Read random fun facts one at a time and save the ones you like to your list.
- 03
Switch to Real or Fake? and sort 10 statements into real facts and viral fakes.
- 04
Check the source link and explanation on every fact and every debunk.
- 05
Print a facts sheet, copy your list, or share a fact or your score.
Showing 132 of 132 real facts and 34 of 34 fake facts
Random fun facts by category
Animals fun facts
Male seahorses get pregnant and give birth to their young.
The female transfers her eggs into the male's brood pouch, where they are fertilized and carried until birth.
Flamingos get their pink color from the food they eat.
Carotenoid pigments in the algae and small crustaceans they eat tint their feathers pink or reddish.
San Diego Zoo Wildlife Alliance: Flamingo (opens in a new tab)
A giraffe has the same number of neck bones as a human: seven.
Giraffe neck vertebrae are just very long, each one over 10 inches (25.4 centimeters).
San Diego Zoo Wildlife Alliance: Giraffe (opens in a new tab)
Hummingbirds can fly backward as well as sideways and upside down.
Their wings are mostly hand bones and rotate in a figure-eight pattern, which lets them hover and reverse.
San Diego Zoo Wildlife Alliance: Hummingbird (opens in a new tab)
A sea otter has more than a million hairs per square inch of fur.
Sea otters rely on this thick fur to stay warm in cold coastal water.
Axolotls can regenerate limbs, lungs, heart, jaws and even parts of their brain.
Scientists study this regeneration hoping to learn how similar therapies could help people.
San Diego Zoo Wildlife Alliance: Axolotl (opens in a new tab)
A platypus finds prey underwater using about 40,000 electroreceptors in its bill.
While diving, its eyes and ears are closed, so it detects the faint electrical impulses made by prey.
San Diego Zoo Wildlife Alliance: Platypus (opens in a new tab)
Giant pandas hold bamboo using an enlarged wrist bone that works like a thumb.
The "pseudo-thumb" lets them grip and manipulate bamboo almost as well as a human thumb handles objects.
San Diego Zoo Wildlife Alliance: Giant Panda (opens in a new tab)
Wombats are the only animals in the world known to produce cube-shaped poop.
Research suggests the shape of the intestine, and how it stretches, helps sculpt the feces as food is digested.
An octopus has three hearts.
Per the Oregon Coast Aquarium, they pump the octopus's blue-colored blood.
Oregon Coast Aquarium: Giant Pacific Octopus (opens in a new tab)
A blue whale's heart is about as large as a small car.
Blue whales are the largest animals known to have ever lived on Earth, so everything about them is huge.
Elephants can recognize themselves in a mirror, something few animals can do.
National Geographic notes that few animals are known to pass this mirror test.
Algae grow on the fur of three-toed sloths.
Sloths move so slowly that algae takes hold in their fur, which also helps them blend in with green leaves.
A mantis shrimp's punch is strong enough to snap a crab's claw.
It keeps its hinged forearms, which look like a praying mantis's, tucked away until the moment it strikes.
Koalas can sleep as much as 20 hours a day.
Eucalyptus leaves give them few calories, so they conserve energy by sleeping and moving only occasionally.
Sea otters have pockets of loose skin under their forearms for stashing food.
They tuck prey into these pockets during a dive, which leaves their paws free to hunt for more.
A female giant Pacific octopus has about 2,240 suckers on her arms.
Males have about 100 fewer suction cups, which give the octopus an iron grip as well as a keen sense of touch.
Monterey Bay Aquarium: Giant Pacific octopus (opens in a new tab)
A cheetah can run up to 70 miles per hour, faster than the fastest racehorse.
The cheetah is the fastest land mammal, while the fastest racehorse runs 43 miles per hour.
San Diego Zoo Wildlife Alliance: Cheetah (opens in a new tab)
Space fun facts
A single day on Venus lasts longer than a whole Venus year.
Venus rotates so slowly that one day is 243 Earth days, while its trip around the Sun takes only 225 Earth days.
Saturn is the only planet in our solar system with an average density less than water.
Saturn is mostly hydrogen and helium, so NASA says it could float in a bathtub if one were big enough.
Olympus Mons on Mars is the largest volcano in the solar system, standing more than 25 miles tall.
It rises roughly three times higher than Mount Everest, and its base covers an area as large as Arizona.
Sunlight takes about eight minutes to reach Earth.
The Sun is about 93 million miles away, and light covers that distance in roughly eight minutes.
Uranus spins on its side, rolling around the Sun like a ball.
Its rotation axis is tilted nearly 90 degrees from the plane of its orbit.
On Mercury, one sunrise-to-sunrise day lasts just over two Mercury years.
One Mercury solar day equals 176 Earth days, because the planet spins slowly while whipping around the Sun.
Jupiter's Great Red Spot is a storm about twice as wide as Earth that has been observed for more than 300 years.
Astronomers have tracked the swirling oval of clouds for centuries.
It would take about 1.3 million Earths to fill the volume of the Sun.
The Sun is also so massive that it holds 99.8% of the solar system's mass.
A sugar-cube-sized piece of neutron star material would weigh about a billion tons on Earth.
A neutron star squeezes about the mass of a sun into a ball roughly 20 kilometers across.
NASA Imagine the Universe: Neutron Stars (opens in a new tab)
Falling toward a black hole would stretch you out like spaghetti, a process scientists really call spaghettification.
Gravity is so much stronger on the nearer side of an object that the difference stretches it.
NASA Space Place: What Is a Black Hole? (opens in a new tab)
Astronauts on the International Space Station see 16 sunrises and sunsets every day.
The station orbits Earth about every 90 minutes, making 16 orbits in 24 hours.
The Moon is slowly moving away from Earth, about an inch farther each year.
NASA reports the gradual drift as part of the Earth-Moon system's long-term evolution.
Neptune has winds that whip clouds across the planet at more than 1,200 miles per hour.
NASA says that is far beyond Earth's strongest winds, which top out around 250 miles per hour.
Voyager 1 and Voyager 2 are the only spacecraft ever to operate outside the Sun's protective bubble, the heliosphere.
Voyager 1 crossed the boundary in 2012 and Voyager 2 followed in 2018.
Comets are cosmic snowballs of frozen gases, rock and dust, and when frozen they are about the size of a small town.
Near the Sun they heat up and spew a glowing head of dust and gas larger than most planets.
Human body fun facts
The smallest bone in your body is the stapes, a tiny stirrup-shaped bone deep inside your ear.
It is one of three small ear bones that pass sound vibrations along to the inner ear.
KidsHealth (Nemours): What's the Stapes? (for Kids) (opens in a new tab)
A baby is born with about 300 bones, but an adult has only 206.
Many of a baby's bones start partly as soft cartilage and gradually fuse together as the child grows.
KidsHealth (Nemours): Your Bones (for Kids) (opens in a new tab)
The longest bone in your body is the femur, which runs from your pelvis to your knee.
Your leg bones are large and strong because they support the weight of your body.
KidsHealth (Nemours): Your Bones (for Kids) (opens in a new tab)
Your fingerprint patterns develop before you are born and stay the same for your whole life.
The ridge patterns on your fingertips form before birth, and their fine details are specific to each person.
MedlinePlus Genetics (NIH): Are fingerprints determined by genetics? (opens in a new tab)
Every minute you lose about 30,000 to 40,000 dead skin cells from the surface of your skin.
Your outer skin layer keeps making new cells, so old ones constantly flake off without you noticing.
KidsHealth (Nemours): Your Skin (for Kids) (opens in a new tab)
The human body has more than 600 muscles.
They do everything from pumping blood to helping you lift a heavy backpack.
KidsHealth (Nemours): What Do Muscles Do? (for Kids) (opens in a new tab)
If you stretched out an adult's small intestine, it would be about 22 feet long.
It is a narrow tube packed neatly inside your belly, where most of the digestion of food is completed.
KidsHealth (Nemours): Your Digestive System (for Kids) (opens in a new tab)
At the base-pair level, your genome is 99.9 percent the same as the genome of every other human.
Only about 0.1 percent of our DNA differs between people, and that small difference helps make each person unique.
National Human Genome Research Institute (NIH): Human Genomic Variation (opens in a new tab)
The clear front window of your eye, the cornea, has no blood vessels.
Even tiny blood vessels would interfere with focusing light, so the cornea gets nourishment from tears and the fluid behind it instead.
SUNY Downstate Health Sciences University: The Cornea (opens in a new tab)
Your brain and heart are each about 73 percent water.
The USGS reports that water makes up large shares of body organs, from about 31 percent in bones to about 83 percent in the lungs.
U.S. Geological Survey: The Water in You: Water and the Human Body (opens in a new tab)
Your red blood cells are made inside your bones, in the red bone marrow.
Red blood cells carry oxygen to the body's tissues and bring carbon dioxide back to the lungs.
MedlinePlus (NIH): Red blood cell production (opens in a new tab)
If you uncoiled the DNA from just one of your cells, it would be about 6 feet long.
DNA is packed extremely tightly into each cell; end to end, all the DNA in your body would stretch 42 billion miles.
The human brain contains approximately 86 billion neurons.
Neurons are the nerve cells that carry signals around the brain and body.
University of Washington: Neuroscience For Kids: Questions and Answers (opens in a new tab)
Tooth enamel is the hardest substance in the human body.
Enamel is the highly mineralized outer layer of the tooth crown and protects teeth from wear.
Each of your kidneys is about 5 inches long, roughly the size of a computer mouse.
You normally have two kidneys, shaped like kidney beans, located toward the back of your body just under the ribs.
KidsHealth (Nemours): Your Kidneys (for Kids) (opens in a new tab)
History fun facts
The Statue of Liberty was a brown, penny-like color when it was finished in 1886 and took about thirty years to turn green.
Its copper skin slowly oxidized into a green patina over decades, according to the National Park Service.
The Statue of Liberty was built in France from 1875 to 1884, then taken apart and shipped to New York in 1885.
It was reassembled on its pedestal in New York Harbor and dedicated on October 28, 1886.
National Park Service: Statue of Liberty Facts (opens in a new tab)
After British troops burned the Capitol in 1814, the Library of Congress was rebuilt around Thomas Jefferson's personal collection of 6,487 volumes.
Jefferson sold his library to Congress in 1815 to replace the books lost in the fire.
Library of Congress: Jefferson's Library - Thomas Jefferson (opens in a new tab)
Most delegates did not sign the Declaration of Independence on July 4, 1776; the engrossed copy was signed starting August 2.
The National Archives notes that the idea everyone signed on July 4 is a widely held misconception.
National Archives: The Declaration of Independence: A History (opens in a new tab)
The Rosetta Stone, found by French soldiers in 1799, carries the same decree in hieroglyphics, Demotic script and ancient Greek.
Because scholars could read the Greek, the stone became the key to decoding Egyptian hieroglyphs.
In 1884, delegates meeting in Washington, D.C. voted to make the Greenwich Meridian the world's Prime Meridian.
The line runs through the Royal Observatory in Greenwich, London, and defines zero degrees longitude.
Cleopatra, Egypt's last pharaoh, lived closer in time to us than to the building of the Pyramids at Giza.
The Giza pyramids were built around 2,500 years before her reign, while she lived about 2,000 years ago.
National Geographic Kids: Ancient Egypt facts and history (opens in a new tab)
The first network email, sent in 1971 by Ray Tomlinson, travelled between two machines sitting side by side, and he picked the @ symbol for addresses.
Tomlinson needed a character that would not otherwise appear in an address, so he chose @ from the keyboard.
NPR: Ray Tomlinson, Inventor Of Modern Email, Dies (opens in a new tab)
The first powered airplane flight by the Wright brothers in 1903 lasted just 12 seconds and covered 120 feet.
Orville Wright piloted the Wright Flyer at Kitty Hawk, North Carolina, at a top speed of 6.8 miles per hour.
NASA: 120 Years Ago: The First Powered Flight at Kitty Hawk (opens in a new tab)
Abraham Lincoln is the only US president to hold a patent, granted in 1849 for a way to float boats over shallow water.
Patent number 6469 covered adjustable buoyant chambers attached to steamboats.
National Park Service: Lincoln Facts - Lincoln Home National Historic Site (opens in a new tab)
The Gutenberg Bible is the first great book printed in Western Europe from movable metal type.
The Library of Congress calls it a turning point in bookmaking and the move from the Middle Ages to the modern world.
Library of Congress: The Gutenberg Bible (opens in a new tab)
King John put his seal on Magna Carta at Runnymede on June 15, 1215, after pressure from 40 rebellious barons.
The National Archives says he agreed to avert civil war, though the pope annulled it about 10 weeks later.
About 90% of Mount Rushmore was carved using dynamite, over a fourteen year period from 1927 to 1941.
Almost 400 workers took part in the project, according to the National Park Service.
National Park Service: Carving History - Mount Rushmore National Memorial (opens in a new tab)National Park Service (2): The Workers - Mount Rushmore National Memorial (opens in a new tab)
The Pony Express operated for only about 18 months, between April 1860 and October 1861.
The transcontinental telegraph made the horseback mail relay obsolete.
National Park Service: History & Culture - Pony Express National Historic Trail (opens in a new tab)National Park Service (2): Commemoration of the Pony Express (opens in a new tab)
At Gettysburg in 1863, Edward Everett spoke for more than two hours, while Lincoln's famous address took about two minutes.
Lincoln's brief speech is now one of the most celebrated in American history.
National Park Service: Lincoln at Gettysburg (opens in a new tab)
Food fun facts
Botanically, bananas are berries, but strawberries and raspberries are not.
True berries are simple fruits from one flower with one ovary; strawberries come from a flower with more than one ovary, making them aggregate fruits.
Stanford Magazine: Bananas Are Berries? (opens in a new tab)
Peanuts are not true nuts; they belong to the legume family and grow underground.
Peanuts are in the Leguminosae family, the same plant family as peas and beans.
In 1893 the US Supreme Court ruled in Nix v. Hedden that tomatoes count as vegetables for tariff purposes.
The case was about a tax on imported vegetables, and the Court went by everyday usage rather than botany.
Cornell Legal Information Institute: Nix v. Hedden, 149 U.S. 304 (1893) (opens in a new tab)
Fresh cranberries bounce when you drop them, because they contain air pockets.
The same air pockets make cranberries float when growers flood the bog at harvest time.
Ketchup did not start with tomatoes: it began as a fermented fish sauce, and the first published tomato ketchup recipe appeared in 1812.
Traders likely brought the fish sauce from Vietnam to southeastern China, and the British later copied it before tomatoes were added.
National Geographic: How Was Ketchup Invented? (opens in a new tab)
A cashew nut grows outside its fruit: the juicy cashew apple is actually the swollen stalk above the nut.
The stalk above the nut swells into the yellow or red cashew apple as the nut matures.
In 1841 a 12-year-old enslaved boy named Edmond Albius on Reunion Island found a way to hand-pollinate vanilla orchids, which made large-scale vanilla farming possible.
Vanilla flowers have a membrane separating the male and female parts, so outside their native Mexico they needed people to pollinate them.
In her whole lifetime, a worker honey bee makes only about 1/12 of a teaspoon of honey.
This is a lifetime average, which is why it takes the work of many bees to fill a single jar.
PBS NOVA: NOVA Online: The Buzz About Bees (opens in a new tab)
The first domesticated carrots were purple and yellow, and orange carrots were only first described about 500 years ago.
Researchers note that purple and yellow were the first carrot colors, reported about 1,100 years ago.
In the Aztec Empire, cacao beans were used as everyday money, while cotton cloth was used for more valuable goods.
Cacao and cotton did not grow in the Aztec capital, which is believed to be why they were chosen as currency.
A pineapple is a multiple fruit made of many berries fused together.
Each scale on the outside comes from a separate flower, and those flowers fuse into a single fruit.
Cornell University Conservatory: Ananas comosus (pineapple) (opens in a new tab)
A popcorn kernel pops when water inside turns to steam and the pressure reaches about 135 pounds per square inch, bursting the hull.
The soft starch inside then inflates and spills out as the familiar fluffy puff.
The Popcorn Board: Science Fair Projects: How Popcorn Pops (opens in a new tab)
Botanically, an avocado is a berry with one giant seed.
True berries come from one flower with one ovary; avocados fit this even though they look like stone fruits.
Stanford Magazine: Bananas Are Berries? (opens in a new tab)
Geography fun facts
The deepest part of the ocean, Challenger Deep in the Mariana Trench, is approximately 10,935 meters (35,876 feet) deep.
It lies beneath the western Pacific Ocean and is named after HMS Challenger, whose crew first sounded it in 1875.
NOAA National Ocean Service: How deep is the ocean? (opens in a new tab)
Russia's Lake Baikal is the deepest lake in the world, at over 1,600 meters, and holds roughly 20 percent of the world's surface fresh water.
The USGS also says it is perhaps more than 25 million years old, making it the oldest lake too.
USGS: Lake Baikal - A Touchstone for Global Change and Rift Studies (opens in a new tab)
Measured from base to peak, Mauna Kea in Hawaii is taller than Mount Everest.
Most of Mauna Kea is underwater; its total height is nearly 33,500 feet, while Everest has the highest summit above sea level.
USGS: How big are the Hawaiian volcanoes? (opens in a new tab)NOAA National Ocean Service: What is the highest point on Earth as measured from Earth's center? (opens in a new tab)
The summit of Ecuador's Mount Chimborazo is farther from the center of the Earth than the top of Mount Everest.
Earth bulges at the equator, and Chimborazo sits just one degree south of it.
The world record highest air temperature, 134 degrees F (57 C), was recorded at Furnace Creek in Death Valley on July 10, 1913.
The National Park Service says Death Valley holds the record for the hottest place on Earth.
National Park Service: Weather and Climate - Death Valley National Park (opens in a new tab)
The Dead Sea depression is the lowest spot on land, sinking about 400 meters (1,300 feet) below sea level.
NASA notes it is fed mainly by the Jordan River and sits in an extremely dry climate.
Lake Superior has the largest surface area of any freshwater lake on Earth.
It is also the largest, coldest and most pristine of the Great Lakes, per the National Park Service.
National Park Service: Lake Superior - Pictured Rocks National Lakeshore (opens in a new tab)
The Antarctic ice sheet contains about 90% of the ice on Earth.
If it melted, NASA says it would raise sea levels worldwide by over 200 feet.
NASA Scientific Visualization Studio: Antarctic ice sheet (opens in a new tab)
Canada has the longest coastline of any country in the world.
Guinness World Records lists at least 202,080 km of shoreline, and some estimates run higher depending on how it is measured.
Guinness World Records: Longest coastline (opens in a new tab)
Russia, the largest country in the world, spans 11 time zones across two continents.
National Geographic Kids also notes it has coasts on three oceans: the Atlantic, Pacific and Arctic.
The entire continental United States could almost fit inside Africa's Sahara desert.
The Sahara is one of the largest deserts on Earth, according to National Geographic Kids.
National Geographic Kids: Desert Habitat (opens in a new tab)
The longest mountain range on Earth is the mid-ocean ridge, which winds about 40,389 miles around the globe, mostly underwater.
About 90 percent of the system lies beneath the ocean, so most of it has never been seen by people on the surface.
NOAA National Ocean Service: What is the longest mountain range on Earth? (opens in a new tab)
The Great Barrier Reef is the largest living structure on Earth, stretching for 1,429 miles off the coast of Australia.
NOAA says it covers an area of approximately 133,000 square miles.
NOAA National Ocean Service: What is the largest living structure on Earth? (opens in a new tab)
The Pacific Ocean covers approximately 155 million square kilometers and holds more than half of the free water on Earth.
NOAA calls it by far the largest of the world's ocean basins; Magellan named it in the 16th century.
NOAA National Ocean Service: How did the Pacific Ocean get its name? (opens in a new tab)
Science fun facts
Lightning can heat the air around it to about 50,000 degrees Fahrenheit, roughly five times hotter than the surface of the Sun.
The National Weather Service says this is the temperature of air as a bolt passes through it.
NOAA National Weather Service: Understanding Lightning Science (opens in a new tab)
Thunder travels about a mile every five seconds, so you can count the gap after a flash to estimate how far away it was.
Sound moves much slower than light, so the flash reaches you first.
NOAA National Weather Service: Understanding Lightning Science (opens in a new tab)
Ice is less dense than liquid water, which is why ice cubes and icebergs float.
Water is unusual because it expands as it freezes, so ice takes up more space than the same water did as a liquid.
The oceans hold about 96.5 percent of all of Earth's water.
About 71 percent of Earth's surface is covered by water.
USGS: How Much Water Is There on Earth? (opens in a new tab)
The meter is officially defined using the speed of light, which is fixed at exactly 299,792,458 meters per second.
Scientists once used a metal bar to define the meter before switching to a constant of nature.
One second is officially defined as 9,192,631,770 oscillations of microwave radiation from cesium atoms.
Atomic clocks count those oscillations, and cesium clocks can keep time to within a tiny fraction of a second per year.
Earth's solid inner core, made of iron and nickel, is as hot as 9,800 degrees Fahrenheit.
It is a sphere about 759 miles in radius at the very center of the planet.
About half of the oxygen on Earth comes from the ocean.
Tiny photosynthetic plankton drifting in the sunlit surface layer produce much of it.
NOAA: How much oxygen comes from the ocean? (opens in a new tab)
Absolute zero, the coldest possible temperature, is -273.15 degrees Celsius (-459.67 degrees Fahrenheit).
The Kelvin scale starts there, and one kelvin is the same size as one degree Celsius.
Sound travels much faster in water than in air.
NOAA notes this speed difference even though how far sound carries in the ocean depends on temperature and pressure.
NOAA: How does sound travel in the ocean? (opens in a new tab)
Helium was discovered in the Sun before it was ever found on Earth.
Astronomers spotted a bright yellow line in the Sun's spectrum in 1868, and the element was named for Helios, the Greek word for Sun.
Other than mercury, water has the greatest surface tension of any liquid.
Water molecules cling strongly to each other, so surface molecules form a tough film.
Auroras happen when charged particles streaming from the Sun interact with Earth's magnetic shield and rain energy down on our atmosphere.
The Sun continuously sends out this stream, called the solar wind.
Since 2018 the kilogram has been defined using the Planck constant instead of a physical object.
Sixty nations voted in November 2018 to redefine it in terms of an invariant of nature.
NIST: Kilogram: Mass and the Planck Constant (opens in a new tab)
Language and words fun facts
The verb 'set' has 430 senses listed in the second edition of the Oxford English Dictionary, giving it the longest entry in that dictionary.
Guinness World Records reports 430 senses in the 1989 second edition, with an entry of 60,000 words. Later editions have since given other verbs more senses.
Guinness World Records: English word with the most meanings (opens in a new tab)
The dot over a lowercase i or j has its own name: it is called a tittle.
The word comes from the Latin titulus, and the mark first appeared in Latin manuscripts in the 11th century to set apart neighboring i and j letters.
Dictionary.com: What's the name for the dot over i and j? (opens in a new tab)
The word 'goodbye' began as a contraction of the phrase 'God be with ye'.
Dictionary.com records the contraction as first appearing in the late 1500s, with 'good' replacing 'God' by analogy with greetings like 'good day'.
The expression 'OK' first appeared in print on March 23, 1839, in the Boston Morning Post.
NPR notes it may have started as an abbreviation of a joke misspelling, 'oll korrect', in a fad of abbreviations popular in Boston at the time.
NPR: OK and Other Expressions (opens in a new tab)World Wide Words: OK: Questions and Answers (opens in a new tab)
The word 'robot' comes from the Czech word 'robota', meaning forced labor of the kind done by serfs.
The word entered wide use through the 1920 play R.U.R. (Rossum's Universal Robots) by Karel Capek, whose robots were artificial workers.
Popular Science: The first 'robots' were made of flesh and bone (opens in a new tab)
Hawaiian has just five vowel sounds and eight consonants, counting the okina (a glottal stop) as a consonant.
The National Park Service lists the consonants as h, k, l, m, n, p, w and the okina.
National Park Service: Olelo Hawaii: Hawaiian Language (opens in a new tab)
'The quick brown fox jumps over the lazy dog' uses every letter of the alphabet and was once used to test that every key on a manual typewriter worked.
A sentence that uses every letter at least once is called a pangram.
NPR: 10 New Ways A Quick Brown Fox Tests A QWERTY Keyboard (opens in a new tab)
'Aegilops' (a type of grass) is the longest English word whose letters appear in alphabetical order, at eight letters.
Guinness World Records lists it as the longest such word and gives shorter examples like 'almost', 'biopsy' and 'accent'.
Guinness World Records: Longest English word with letters in alphabetical order (opens in a new tab)
'Spoonfeed' is the longest English word with its letters in reverse alphabetical order, at nine letters.
Guinness World Records names it as the longest word with this property.
The longest known palindromic word is the Finnish 'saippuakivikauppias', which has 19 letters and means a dealer in lye.
Guinness World Records names it as the longest palindromic word. Lye is caustic soda, once used to make soap.
Guinness World Records: Longest palindromic word (opens in a new tab)
'Scraunched' is among the longest English words with only one syllable, at 10 letters.
Guinness World Records also lists the archaic word 'strengthed' at 10 letters, and says nine-letter examples include 'scratched', 'screeched' and 'squelched'.
Guinness World Records: Longest monosyllabic English words (opens in a new tab)
Papua New Guinea is home to about 840 languages, roughly 12 percent of all the world's languages.
About 7,000 languages are spoken worldwide, so one island nation is home to an unusually large share of them.
Noah Webster's 1828 American Dictionary of the English Language listed 70,000 words, thousands more than its closest competitor.
Webster's dictionaries went on to help standardize and unify American English.
History.com: Why Don't Americans Spell the Same as the British? (opens in a new tab)
Bangkok's full official name, in its most scholarly transliteration, is 168 letters long, which Guinness World Records lists as the longest place name.
The Thai name begins 'Krungthep Mahanakhon'. Guinness also gives an official shorter version of 111 letters.
Guinness World Records: Longest place name (opens in a new tab)
Weird laws and records fun facts
Robert Wadlow of Alton, Illinois, is the tallest man in medical history, measuring 2.72 m (8 ft 11.1 in) when last measured on 27 June 1940.
Guinness World Records recognizes him as the tallest man ever with verified evidence.
Guinness World Records: Tallest man ever (opens in a new tab)
The General Sherman Tree in Sequoia National Park is the largest tree in the world by volume, estimated at about 52,500 cubic feet.
The National Park Service counts trunk volume only, and estimates the tree is about 2,200 years old.
National Park Service: The General Sherman Tree (opens in a new tab)National Park Service (2): The Largest Trees in the World (opens in a new tab)
Pando, a quaking aspen clone in Utah, is believed to be the largest organism ever found, with over 40,000 trees spreading across 106 acres.
The US Forest Service says the trees are genetically identical and weigh nearly 13 million pounds in total.
US Forest Service, Fishlake National Forest: Pando (opens in a new tab)
Great Basin bristlecone pines can live to be over 5,000 years old and are thought to be the oldest individual living things in the world.
The National Park Service says bristlecones grow in harsh conditions and twisted shapes that help them survive.
National Park Service: The Prometheus Story (opens in a new tab)
According to the National Park Service, the tallest known tree is a coast redwood in California's Redwood National and State Parks at 379 feet.
The NPS notes that the title changes over time as trees grow or lose their tops to weather and age.
National Park Service: Frequently Asked Questions (opens in a new tab)
Jeanne Calment of France lived to 122 years and 164 days, the greatest fully authenticated human age on record.
Guinness World Records says she was born on 21 February 1875 and died in Arles, France, on 4 August 1997.
Guinness World Records: Oldest person ever (opens in a new tab)
The shortest war on record, between Britain and Zanzibar, lasted from 9:00 am to 9:45 am on 27 August 1896.
Guinness World Records says it began after a sultan died and a relative took the throne without British approval.
Ming, an ocean quahog clam dredged off Iceland in 2006, is the longest-lived non-colonial animal ever discovered, at an estimated 507 years old.
Guinness World Records says researchers first estimated 405-410 years, then revised it to 507 years in 2013.
Guinness World Records: Oldest non-colonial animal ever (opens in a new tab)
The Greenland shark can live for about 392 years, making it the longest-lived vertebrate.
Guinness World Records cites a 2016 study, and says the shark grows only roughly 1 centimetre (0.4 inches) per year.
Guinness World Records: Longest lifespan for a vertebrate (opens in a new tab)
Under section 32 of the UK's Salmon Act 1986, handling fish in suspicious circumstances is a criminal offence.
The law applies if you receive or handle fish when you believe, or it would be reasonable to suspect, that a fishing offence was committed in relation to it.
legislation.gov.uk: Salmon Act 1986, section 32 (opens in a new tab)
US federal law makes it a crime to knowingly use the Smokey Bear character or name for profit without authorization.
It is 18 U.S.C. 711, which allows uses authorized under rules issued by the Secretary of Agriculture.
US Government Publishing Office: 18 U.S.C. 711: Smokey Bear character or name (opens in a new tab)
Hawaii state law generally bans billboards, with only a short list of exceptions.
Hawaii Revised Statutes section 445-112 says no person shall erect, maintain or use a billboard or outdoor advertising device except as the section provides.
Hawaii State Legislature: HRS 445-112: Where and when permitted (opens in a new tab)
Singapore banned the sale of chewing gum in 1992 to curb littering and vandalism.
Officials said gum had been stuck on tables, chairs and train door sensors, and the ban helps keep the city clean.
The Mercury (South Africa): Singapore retains gum ban (opens in a new tab)
Viral fake facts that are not true
These popular "facts" get shared constantly, and every one is false. Here is what is actually true, where each myth likely came from, and a source.
Myth - Animals
Goldfish only have a three-second memory.
The truth: Goldfish can remember things for weeks, months and even years. They can be trained to find food, push levers and recognize feeding cues.
Where it came from: No one knows where it began. Fish-cognition researcher Culum Brown notes the saying is repeated almost everywhere in the world despite having no scientific backing.
Live Science: Do goldfish really have a 3-second memory? (opens in a new tab)
Myth - Human body
Humans only use 10 percent of their brains.
The truth: Brain imaging shows we use virtually all of the brain, and damage to almost any area has effects. Different regions are active at different moments.
Where it came from: It has been linked to psychologist William James, who wrote that we use only a small part of our possible mental resources, and to quotes wrongly credited to Albert Einstein.
Scientific American: Do People Only Use 10 Percent of Their Brains? (opens in a new tab)
Myth - Geography
The Great Wall of China is the only man-made object you can see from space with the naked eye.
The truth: NASA says the wall is difficult or impossible to see with the naked eye from low Earth orbit, and it is not visible from the Moon. It is long but made of materials that blend into the land.
Where it came from: The wall is famously long, and the idea was repeated for decades, even before anyone had been to space.
NASA: Great Wall (opens in a new tab)Scientific American: Is China's Great Wall Visible from Space? (opens in a new tab)
Myth - Animals
Bulls charge because the color red enrages them.
The truth: Cattle are color-blind to red. The bull is most likely reacting to the movement of the cape, and it charges the larger magenta capote with equal fury.
Where it came from: Matadors use a red muleta, and the color is said to hide blood, but the bull responds to motion.
Live Science: Why Do Bulls Charge When they See Red? (opens in a new tab)
Myth - Animals
The average person swallows eight spiders a year while sleeping.
The truth: There is no record of this happening regularly. Sleeping people make vibrations and breathing that spiders avoid.
Where it came from: It spread as a supposed fun fact with no record in the scientific or medical literature.
Myth - Animals
Bats are blind.
The truth: Bats are not blind. They have small eyes with sensitive vision that works in very dim light, and many also use echolocation.
Where it came from: Echolocation is so striking that people assumed bats must not rely on eyesight.
Myth - Science
Lightning never strikes the same place twice.
The truth: Lightning often strikes the same place repeatedly, especially tall, pointy, isolated objects. The Empire State Building is hit an average of 23 times a year.
Where it came from: It began as a proverb about misfortune and was applied to lightning.
National Weather Service: Lightning Myths (opens in a new tab)
Myth - Animals
Chameleons change color to blend into their background.
The truth: Chameleons do not change color mainly to blend in. The color shift is mostly a signal, and changes in temperature, mood and stress also trigger it.
Where it came from: Their natural green and brown colors do help them hide, so people assumed color change was for blending in.
Live Science: Chameleon Color Change Isn't All About Hiding (opens in a new tab)
Myth - History
Napoleon Bonaparte was extremely short.
The truth: Napoleon was described as about five foot six inches tall, which was close to average for the time. French units were longer than English ones, which confused later accounts.
Where it came from: His height was recorded in French units that were longer than English ones, and British cartoons made him look tiny.
National Geographic: Was Napoleon even short? (opens in a new tab)History.com: Was Napoleon Short? Origins of the 'Napoleon Complex' (opens in a new tab)
Myth - History
Vikings wore horned helmets into battle.
The truth: Only one nearly complete Viking-age helmet has ever been found, the Gjermundbu helmet from Norway, and it has no horns.
Where it came from: Wagner's 1870s opera costumes and 19th-century paintings popularized the look.
National Geographic: These 6 Viking myths are compelling, but are they true? (opens in a new tab)History.com: Did Vikings really wear horned helmets? (opens in a new tab)
Myth - Human body
Shaving makes your hair grow back thicker and darker.
The truth: Shaving cuts the hair above the skin and does not change the follicle, so it does not change thickness or growth rate.
Where it came from: A cut hair has a blunt tip that can feel coarser as it grows out.
Myth - Human body
Cracking your knuckles gives you arthritis.
The truth: Studies comparing habitual knuckle crackers with non-crackers have not found a higher rate of hand arthritis.
Where it came from: The popping sound seems damaging, so people assumed it must wear out joints.
Harvard Health: Does cracking knuckles cause arthritis? (opens in a new tab)
Myth - Food
Sugar makes children hyperactive.
The truth: Double-blind studies have found that sugar does not change children's behavior. Parents who expect a sugar rush tend to see one.
Where it came from: The idea spread in the 1970s through a best-selling book on food additives and behavior.
National Geographic: Sugar doesn't actually make kids hyper (opens in a new tab)
Myth - Human body
Different parts of the tongue taste different things: sweet at the tip, bitter at the back.
The truth: Receptors for all basic tastes are spread across the tongue. Sensitivity differs only slightly from place to place.
Where it came from: A diagram of tongue zones spread through textbooks, but later research showed taste receptors work across the whole tongue.
PMC / NIH: The tongue map and the spatial modulation of taste perception (opens in a new tab)
Myth - Animals
Ostriches bury their heads in the sand when scared.
The truth: Ostriches do not bury their heads. They lie low and still, and turn eggs in nest holes, which can look like head burying from a distance.
Where it came from: The Roman writer Pliny the Elder described ostriches hiding their heads in bushes.
National Geographic Kids: Animal Myths Busted (opens in a new tab)
Myth - Human body
Hair and fingernails keep growing after you die.
The truth: They do not. After death the body dehydrates and the skin shrinks, exposing parts of the nails and hair that were under the skin, so they look longer.
Where it came from: Shrinking skin makes the nails and hair look longer after death, so it seems like growth.
BMJ / PMC: Medical myths (opens in a new tab)Live Science: Do Hair and Nails Keep Growing After a Person Dies? (opens in a new tab)
Myth - Science
A penny dropped from the Empire State Building can kill someone.
The truth: A falling penny reaches a terminal velocity because of air resistance. It might damage a skull but not drill through it.
Where it came from: It sounds plausible because the building is so tall.
Scientific American: Could a Penny Dropped Off a Skyscraper Actually Kill You? (opens in a new tab)
Myth - History
Albert Einstein failed math in school.
The truth: Einstein did well at math. He dismissed the story as a myth and said he had mastered differential and integral calculus before he was 15.
Where it came from: Mix-ups over school grading scales and a failed non-math section of an entrance exam fed the story.
History.com: 9 Things You May Not Know About Albert Einstein (opens in a new tab)
Myth - Animals
Camels store water in their humps.
The truth: Camel humps store fat that serves as an energy source, not water.
Where it came from: Camels can go a long time without drinking, so people assumed the humps held water.
San Diego Zoo: Camel (opens in a new tab)National Geographic: Thirsty animals stay hydrated using these ingenious techniques (opens in a new tab)
Myth - Science
Toilets flush in the opposite direction in the Southern Hemisphere because of the Coriolis effect.
The truth: Toilet swirl comes down to luck and the toilet's design. The Coriolis force only significantly influences very large systems such as hurricanes, trade winds and ocean currents.
Where it came from: Large storms do spin in opposite directions in each hemisphere, and the idea was extended to drains.
Myth - Science
Glass is a slow-flowing liquid, which is why old windows are thicker at the bottom.
The truth: Glass is an amorphous solid and does not flow at room temperature on any human timescale. Old panes were uneven because they were made by hand.
Where it came from: Thick-bottomed panes in old churches seemed to prove it, but installers often put the thick edge down.
Scientific American: Fact or Fiction?: Glass Is a (Supercooled) Liquid (opens in a new tab)
Myth - History
Columbus proved the Earth was round, because medieval people thought it was flat.
The truth: Even in ancient times sailors and scientists knew the Earth was round and had estimated its size. The flat-earth Columbus story was invented in 1828.
Where it came from: Washington Irving's 1828 Columbus biography popularized the flat-earth story.
History.com: Christopher Columbus Never Set Out to Prove the Earth was Round (opens in a new tab)NASA: The Round Earth and Christopher Columbus (opens in a new tab)
Myth - History
George Washington had wooden teeth.
The truth: Washington's dentures were made from materials such as hippopotamus ivory, human teeth and metal fasteners, not wood.
Where it came from: Washington lost teeth from his twenties on and wore several sets of painful, unsightly dentures, and later retellings turned them into wood.
History.com: Did George Washington Have Wooden Teeth? (opens in a new tab)
Myth - History
Marie Antoinette said "Let them eat cake" about peasants who had no bread.
The truth: She almost certainly never said it. A similar line appeared in Rousseau's Confessions in 1766, when she was only 10 years old, and it was blamed on other royals too.
Where it came from: Rousseau's Confessions (1766) credited a similar line to "a great princess," and several other 18th-century royals were blamed for it before it stuck to Marie Antoinette.
History.com: Did Marie-Antoinette Really Say 'Let Them Eat Cake'? (opens in a new tab)
Myth - Animals
If you touch a baby bird, its parents will reject it because of your scent.
The truth: Parent birds do not recognize their young by smell and will not abandon a baby because a person touched it.
Where it came from: It is unclear where it started, but it keeps getting repeated as advice whenever someone finds a fallen nestling.
Myth - Animals
Daddy longlegs are the most venomous spiders in the world, but their fangs are too short to bite.
The truth: The name is used for three unrelated animals. Harvestmen have no venom, and cellar spider venom is not dangerous to people.
Where it came from: The story has no clear source, according to arachnologists.
UC Riverside Entomology: Are daddy longlegs really the most venomous spiders in the world? (opens in a new tab)Burke Museum: Myth: Daddy-longlegs would be deadly but... (opens in a new tab)
Myth - Animals
Dogs see only in black and white.
The truth: Dogs have two cone types and see some color, mainly blues and yellows, similar to red-green color blindness in people.
Where it came from: Scientists once thought dogs saw only in black and white, and the idea took off in the public imagination in the 1940s.
Scientific American: What Colors Do Dogs See? (opens in a new tab)PMC / NIH: Are dogs red-green colour blind? (opens in a new tab)
Myth - Animals
Lemmings jump off cliffs in mass suicide.
The truth: Lemmings do not commit mass suicide. A Disney film from the 1950s faked the cliff scene.
Where it came from: A 1950s Disney documentary brought the myth to the mainstream.
Alaska Department of Fish and Game: Lemming Suicide Myth (opens in a new tab)
Myth - Human body
Humans have exactly five senses.
The truth: Humans have more, including balance, body position (proprioception), temperature and pain.
Where it came from: The five-sense list goes back to Aristotle.
NIH: The Body's Sixth Sense (opens in a new tab)Scientific American: Humans Possess Exotic Sensory Abilities (opens in a new tab)
Myth - Space
Earth has seasons because it is closer to the Sun in summer and farther in winter.
The truth: Seasons come from Earth's tilted axis. In the Northern Hemisphere, Earth is closest to the Sun in winter.
Where it came from: The idea feels logical, since heat depends on distance from a fire.
NASA Space Place: What Causes the Seasons? (opens in a new tab)
Myth - Human body
Blood in your veins is blue until it hits oxygen.
The truth: Human blood is always red. Veins look blue because of how light interacts with skin and tissue.
Where it came from: Diagrams color veins blue, and veins look blue through skin.
Live Science: Blood in Your Veins Is Not Blue (opens in a new tab)
Myth - Space
The far side of the Moon is permanently dark.
The truth: The far side gets as much sunlight as the near side. It is just never visible from Earth.
Where it came from: The far side was unseen until 1959, and "dark" meant unknown.
Myth - Space
Astronauts float on the space station because there is no gravity in space.
The truth: Earth's gravity at station altitude is still nearly 90 percent as strong as at the surface. Astronauts float because they and the station are in free fall around Earth.
Where it came from: Videos of floating astronauts look like gravity has vanished.
Myth - Food
Eating carrots gives you night vision.
The truth: Carrots supply vitamin A, which supports normal vision, but they do not improve healthy eyesight in the dark.
Where it came from: British WWII propaganda credited carrots for pilots' night success to hide radar.
NPR: Do Carrots Really Help Your Vision? (opens in a new tab)
Why fake facts spread, and how to check one
Fake facts survive because they are fun to repeat. A tidy claim like "goldfish only remember three seconds" is easy to share, and every repeat makes it feel more familiar.
Repetition feels like truth
Psychologists call it the illusory truth effect: statements we have heard before feel more true than new ones, even when we know better. Listicles and trivia posts copy each other without citations, so the same myth circulates for decades and each copy looks like confirmation.
Plausible beats accurate
The most durable fake facts sound like something that should be true. Bulls charge at red capes, so red must enrage them. Napoleon was mocked as small, so he must have been short. The real explanation is usually less tidy, which is exactly why it loses the sharing contest.
How to check a fact in two minutes
- Find the original source. A fact with no link, or a link to another listicle, is not sourced.
- Ask whether experts or primary sources say it: a space agency for space, a museum for history, a university or government lab for science.
- Watch for red flags: suspiciously round numbers, no dates, no names, and claims that only appear on trivia sites.
- Search the claim with the word "myth" or "debunked" and see who says what.
Why Lie Library cares
The habit that catches a fake fun fact also catches a fake political claim: find the receipt before you repeat it. Lie Library keeps that receipt for every entry in its archive. Run any claim through the Fact Checker, or see how memory itself goes wrong with the Mandela Effect Test.
Fun facts FAQ
What are some random fun facts?
A few favorites: octopuses have three hearts, a day on Venus is longer than its year, bananas are botanically berries, and the Statue of Liberty was originally a shiny penny-brown before it turned green. Every fact in this generator links to a source you can check.
Are these fun facts true, and how are they sourced?
Yes. Each real fact links to a reputable source such as NASA, NOAA, USGS, the National Park Service, NIH, National Geographic, or a museum or university page, and the source was checked to say what the fact says. Items that could not be verified were left out.
What are common fake facts people believe?
Popular fake facts include that goldfish have a three-second memory, that we only use 10% of our brains, that the Great Wall of China is visible from space with the naked eye, that bats are blind, and that lightning never strikes the same place twice. All are false.
Can I use these fun facts in class or at trivia night?
Yes. Pick the Kids or Classroom audience for kid-safe facts, or Office icebreaker for light ones, save the facts you like, and print a facts sheet with sources. The Real or Fake? mode works as a ready-made trivia round.
Are my saved facts uploaded?
No. Saved facts stay in your browser's local storage on this device and are not uploaded. Use Clear list to remove them.
Related Tools
- Mandela Effect TestFind out which famous details you misremember.
- Fact CheckerCheck a claim against sources.
- Quote CheckerFind out if a quote is real or misattributed.
- Two Truths and a Lie IdeasBuild a believable icebreaker round.
- This or That QuestionsDeal quick either-or prompts for any group.
- All Free ToolsBrowse every Lie Library utility.