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★A rhinoceros' horn is made of keratin, the same stuff as hair.★Ancient Egyptians slept on stone pillows.★Rats laugh when tickled.★The moon has moonquakes.★A snail can sleep for three years straight.★The Great Wall of China is not visible from space with the naked eye.★Voice actors for Mickey and Minnie Mouse got married in real life.★Pigeons can recognize themselves in a mirror.★The longest recorded flight of a chicken lasted 13 seconds.★There are only two countries in the world whose names start with 'The': The Gambia and The Bahamas.★The Dutch were once the tallest people in the world.★Cats can't taste sweetness.★The first computer mouse was made of wood.★A mosquito has 47 teeth.★A blue whale's tongue can weigh as much as an elephant.★It is physically impossible to hum while holding your nose.★Banging your head against a wall for one hour burns 150 calories.★So far, two diseases have successfully been eradicated: smallpox and rinderpest.★Cotton candy was co-invented by a dentist.★You can hear a blue whale's heartbeat from more than two miles away.★Sloths only poop about once a week.★Cashews grow on the outside of a fruit, not inside a shell.★Avocados are toxic to most animals except humans.★A bolt of lightning is five times hotter than the surface of the sun.★Octopuses have three hearts and blue blood.★The human brain uses about 20% of the body's total energy.★We have mapped more of Mars than of our own ocean floor.★There is a village in Norway called 'Hell' that freezes over every winter.★Most 'silver' spoons are actually made of stainless steel.★Dolphins sleep with one eye open.★The Hawaiian alphabet has only 13 letters.★There are more possible iterations of a game of chess than atoms in the observable universe.★Hot water freezes faster than cold water. This is called the Mpemba effect.★A lion's roar can be heard from up to 5 miles away.★Vincent van Gogh only sold one painting during his lifetime.★Pineapples take about two years to grow.★The first oranges weren't orange, they were green.★Starfish can regenerate their lost limbs.★The first item ever sold on eBay was a broken laser pointer.★Polar bears have black skin under their white fur.★The French language has 13 different words for 'kiss'.★Wombat poop is cube-shaped.★Bananas are berries, but strawberries are not.★Humans blink about 15 to 20 times per minute.★Saturn would float if you could find an ocean big enough.★Crows can recognize human faces and hold grudges for years.★An octopus has nine brains.★Sloths can hold their breath longer than dolphins can.★The microwave oven was invented by accident when a researcher noticed a chocolate bar melted in his pocket.★A day on Venus is longer than a year on Venus.★The longest hiccuping spree lasted 68 years.★Chewing gum while you chop onions helps keep you from crying.★The world's oldest known recipe is for beer.★Nintendo was founded in 1889 as a playing card company.★A jiffy is an actual unit of time: 1/100th of a second.★Hippos can't actually swim, they walk along the riverbed.★The shortest war in history lasted 38 to 45 minutes between Britain and Zanzibar.★A hippo's sweat is pink.★Cows have best friends and get stressed when separated.★Google processes more than 8.5 billion searches every single day.★More than half of all people alive today have never made a phone call.★Dolphins have names for each other.★Goldfish can recognize human faces.★Your tongue print is as unique as your fingerprint.★If you lift a kangaroo's tail off the ground it can't hop.★The Statue of Liberty was originally intended to be a lighthouse.★A flock of crows is known as a murder.★Pteronophobia is the fear of being tickled by feathers.★A day on Jupiter lasts only about 10 hours.★A newborn kangaroo is about the size of a jellybean.★A blue whale's heart is roughly the size of a small car.★Dragonflies have been around for about 300 million years.★A crocodile can't stick its tongue out.★Snakes can help predict earthquakes.★Butterflies taste with their feet.★A group of porcupines is called a prickle.★Honey never spoils. Archaeologists found 3000-year-old honey in Egyptian tombs that was still edible.★Ostriches can run faster than horses.★The fear of long words is ironically called hippopotomonstrosesquippedaliophobia.★Cleopatra lived closer in time to the Moon landing than to the building of the Great Pyramid.★A shrimp's heart is located in its head.★The Eiffel Tower can grow up to 6 inches taller during summer.★7% of American adults believe that chocolate milk comes from brown cows.★There's a species of jellyfish that is immortal.★Sea cucumbers breathe through their butts.★Cherophobia is an irrational fear of fun or happiness.★A cloud can weigh more than a million pounds.★A 'jiffy' is one trillionth of a second in physics.★A snail can have up to 25,000 teeth on its tongue.★Octopuses can taste with their arms.★Peanuts aren't nuts, they are legumes.★Pigs can't look up at the sky without rolling over.★29th May is officially Put a Pillow on Your Fridge Day.★Ketchup was once sold as medicine in the 1830s.★The oldest 'your mom' joke was discovered on a 3,500 year old Babylonian tablet.★Bees can recognize individual human faces.★A newborn panda is smaller than a mouse.★Your stomach gets a new lining every 3 to 4 days, otherwise it would digest itself.★The 'new car smell' is made of dozens of chemicals off-gassing from the interior.★The average person spends six months of their life waiting for red lights to turn green.★The average person walks the equivalent of three times around the world in a lifetime.★A group of jellyfish is called a smack.★A hummingbird's heart can beat up to 1,260 times per minute.★The smell of rain has a name: petrichor.★A group of owls is called a parliament.★A group of ferrets is called a business.★Elephants are the only mammals that can't jump.★It takes about eight minutes for sunlight to reach Earth.★Scotland's national animal is the unicorn.★The inventor of the Pringles can is buried in one.★Humans are the only animals that blush.★Humans share 60% of their DNA with bananas.★The Mona Lisa has no eyebrows or eyelashes.★A day on Mercury lasts 59 Earth days.★Bubble wrap was originally invented as wallpaper.★Horses physically cannot vomit.★Sea otters hold hands while sleeping so they don't drift apart.★Tigers have striped skin, not just striped fur.★A group of crows mobbing a predator is literally called a 'murder patrol'.★A group of pandas is called an embarrassment.★There are more than 1,000 chemicals in a cup of coffee.★A 'moment' was medieval unit of time equal to 90 seconds.★Cows have regional accents, they moo differently in different areas.★Koalas have fingerprints nearly identical to humans.★The smell of freshly cut grass is actually a plant distress signal.★A group of flamingos is called a 'flamboyance'.★Barbie's full name is Barbara Millicent Roberts.★There are more stars in the universe than grains of sand on every beach on Earth.★The dot over the letter 'i' is called a tittle.★Antarctica is the only continent without native reptiles or snakes.★Sharks existed on Earth before trees did.★In Switzerland it is illegal to own just one guinea pig.★Your nose can remember 50,000 different scents.★Bananas are curved because they grow towards the sun.★The shortest commercial flight in the world lasts just 57 seconds.★A group of frogs is called an army.