Surprising facts to kick off a “wait, really?” conversation.
Did you know that astronauts can grow up to 2 inches taller in space? Their spine stretches without gravity.
Did You Know This? is a deck of true facts that sound made up. Bananas are berries and strawberries aren't. Sharks have been around longer than trees. The man who designed the Pringles can had his ashes buried in one.
Read a fact out loud and see who already knew it. Most lead somewhere else: where did you hear that, what's the strangest thing you know about animals. It works with kids and with adults who like being right.
Did you know that bananas, pumpkins, and watermelons are botanically berries, but strawberries are not?
Did you know that Cleopatra lived closer to the release of the iPhone than to the building of the Pyramids of Giza?
Did you know that the national animal of Scotland is the unicorn?
Did you know that Venus takes longer to spin once on its axis than to go once around the Sun?
Did you know that some of the water you drink has passed through a dinosaur at some point?
Did you know that sharks have existed longer than trees?
Did you know that Oxford University is older than the Aztec Empire?
Did you know that an octopus has three hearts?
Did you know that honey never spoils in a sealed jar? It's too dry and too acidic for microbes to grow in.
Did you know that Pluto's entire surface is about the same size as Russia?
Did you know that an ordinary cumulus cloud weighs around 500 tons, about the same as 100 elephants?
Did you know that the lighter was invented before matches?
Did you know that the wombat is the only animal whose poop is cube-shaped?
Did you know that lobster blood is colorless, but turns blue when exposed to oxygen?
Did you know that in the 1830s ketchup was sold as medicine for e.g. diarrhea and digestive problems?
Did you know that dolphins sleep with one eye open because only half of their brain sleeps at a time?
Did you know that Lego has made enough bricks for every person on earth to have dozens of them?
Did you know that about 20 quadrillion ants are alive right now? That's 2.5 million ants per person.
Did you know that Antarctica is the world's largest desert?
Did you know that you rebuild your taste buds every couple of weeks? The cells wear out and get replaced.
Did you know that astronauts can grow up to 2 inches taller in space? Their spine stretches without gravity.
Did you know that carrots were purple and yellow first? Dutch growers made orange the standard in the 1600s.
Did you know that babies have about 300 bones when born, but adults only 206, because some bones fuse together?
Did you know that in one study, cows gave more milk when they listened to slow, calming music?
Did you know that Monopoly's ancestor was designed to attack landlords? The Landlord's Game, 1904.
Did you know that France was still using the guillotine when the first Star Wars movie hit theaters in 1977?
Did you know that the pattern on a dog's nose is as unique as a human fingerprint and can be used for identification?
Did you know that a sloth moves so slowly that algae can grow in its fur?
Did you know that length is what limits paper folding? In 2002 a teen folded a 4,000 foot toilet roll 12 times.
Did you know that an elephant can't jump? Even at full speed one foot always stays on the ground.
Did you know that peanuts are not nuts, but legumes?
Did you know that a cockroach can live for about a week without its head? It finally dies of thirst, not the wound.
Did you know that US dollar bills aren't paper? They're a 75% cotton, 25% linen blend.
Did you know that we know the surface of Mars better than the bottom of our own oceans?
Did you know that Barbie's full name is Barbara Millicent Roberts?
Did you know that you cannot hum while holding your nose?
Did you know that about 60% of your genes have a counterpart in a banana? Not 60% of your DNA, though.
Did you know that the King of Hearts in a deck of cards is the only king without a moustache?
Did you know that an ostrich's eye is bigger than its brain?
Did you know that it probably rains diamonds on Uranus and Neptune? Scientists have recreated the process in the lab.
Did you know that the chainsaw's ancestor was a surgical tool, used in childbirth to cut through the pelvic joint?
Did you know that Finland and North Korea are technically only one country (Russia) away from each other?
Did you know that pigs barely sweat? They wallow in mud to cool down, so "sweating like a pig" is a myth.
Did you know that when you eat pineapple, it eats you back? (Bromelain enzyme breaks down proteins in your mouth).
Did you know that a crocodile cannot stick its tongue out of its mouth?
Did you know that red is the rarest natural hair color? Only about 1-2% of people are redheads.
Did you know that space has a smell? Astronauts describe it as seared steak, hot metal, and gunpowder.
Did you know that a tiger's stripes are not just on the fur, but also on its skin?
Did you know that every Granny Smith apple traces back to one tree in Australia? They're all grafted clones.
Did you know that a snail can have up to 14,000 teeth?
Did you know that there are more stars in space than grains of sand on all the beaches in the world?
Did you know that the most common first name in the world is Muhammad, across all its spellings?
Did you know that the largest flying bird ever had a 7 metre wingspan? Pelagornis, 25 million years ago.
Did you know that male gentoo penguins bring their mate pebbles? The stones become the nest they raise chicks in.
Did you know that hopping barely costs a kangaroo extra energy? Its leg tendons work like springs.
Did you know that McDonald's gives away so many Happy Meal toys that it's often called the world's biggest toy distributor?
Did you know that lightning is five times hotter than the surface of the sun?
Did you know that the shortest war in history lasted under an hour? Britain against Zanzibar, 1896.
Did you know that a shuffled deck of cards has almost certainly never been in that exact order before?
Did you know that the man who designed the Pringles can had his ashes buried in one in 2008?
Going through every card takes about 25–40 min, but there's no need to finish in one sitting. The deck runs in your browser with nothing to install, and your place is saved on this device, so you can stop and pick it up later.