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We bet you didn't know these
"Did you know" facts are everywhere, and you might start to hear some over and over again, on the back of a Snapple cap or something. Yes, you know that Napoleon wasn't really that short and that frogs don't drink. But, for your brain-food pleasure, here's a plethora of "did you know" facts that you probably haven't heard before. And for more cool trivia, here are 100 interesting facts about basically everything.
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Did you know each insect is a host to ten bacterial species?
There are around 2 billion species on Earth—with 6.8 million likely to be species of insects. And up to 10 types of bacteria lives inside of each of these insects! Here are more bizarre bug facts that will totally freak you out.
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Did you know Meghan Markle and Prince Harry are incredibly distant cousins?
The old wives' tale that we're attracted to people who look like our parents may be debatable, but the Duke and Duchess of Sussex share more than just a marriage. Apparently, they share an ancestor dating 15 generations back. But they're not the first royals to be married and related—here are more royals who married their relatives. Plus, check out these less disturbing "did you know" facts about the British royal family.
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Did you know instrument strings were made from animals?
The strings of string instruments were originally made from the guts of animals like sheep or lambs. Now, instrument makers have transitioned to metal wiring. But before metal, it was common for all string instruments to be made from the guts of the animals geographically available to the makers. Find out more disturbing facts you'll wish weren't true.
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Did you know there were male engagement rings once?
You know the story: The man spends a small fortune for a ring, kneels, and pops the question. Well, in 1926, jewelers paired with advertisers to sell the concept of the man-gagement ring. The male engagement rings had names like the Pilot, the Stag and the Master. For another "did you know" fact, this is why we wear wedding rings on the fourth finger.
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Did you know Queen Elizabeth II keeps track of when she wore each outfit?
It's rumored that Queen Elizabeth never wears the same hat twice. If she does, she waits years to wear one again, and evidently, there's a spreadsheet recording her exact outfit each day. So, what does she do with all of those hats? A one-time-only exhibit showcased the many hats and handbags she wore during public engagements. If you couldn't make it to that exhibit, this epic timeline of Queen Elizabeth's wackiest hats will fill you in.
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Did you know some common hand gestures are offensive in other countries?
The "devil horns" hand sign seen thrown up at rock concerts can be offensive in other countries. In European and South American countries, this hand sign implies that a man's wife has been unfaithful. The meaning dates back to the etymological meaning of "cuckold" which is "horned" in Italian, Spanish, and Greek. Here are more common hand gestures that you should definitely not make in certain places.
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Did you know 40 percent of human jobs could be replaced by AI in the future?
In about 20 years, the future could look eerily similar to Wall-E. Artificial intelligence expert Kai-Fu Lee said that 40 percent of human jobs could be replaced by equally capable robots. And drivers might be affected the most. Luckily, there are plenty of cool new jobs you could have in the future.
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Did you know Disneyland has an underground tunnel system?
There are lots of quirky things that some think are underneath Disney parks, but these literally are! The tunnels were built in response to characters having to run through other lands to get to their posts, which spoiled the magic. Thanks to the tunnels, you won't see a Tomorrowland spaceman in the Old West–inspired Frontierland. Find out whether more Disney Park rumors are true or false.
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Did you know your body loses up to 8 percent of water on a flight?
Water is our body's mechanical oil—without it, it can't function. You lose about 8 percent of your body water while on a flight. This is because the humidity in the climate-controlled environment can be as low as 10 to 15 percent. Check out these 50 airplane facts you've always been curious about.
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Did you know wind on Mars is audible?
You'll want your bass-heavy headphones for this one. Sensors on the NASA InSight lander on Mars picked up the first recorded sounds of Martian wind through vibrations. The wind can be heard at a decibel within human range with the help of headphones.
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Did you know your skin sheds?
The current skin you're in will be gone in a month—our skin sheds 30,000 to 40,000 skin cells each day. In fact, over 100 of those cells probably flaked off while you were reading this sentence. However, it rejuvenates just as quickly as it deteriorates. Regular exfoliation twice a week helps get rid of lingering skin cells to make room for a fresh layer. Find out more bizarre human body features you didn't know existed.
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Did you know trees can communicate?
Trees talk. Their roots are connected through an underground network of fungi, nicknamed the "Wood Wide Web," that allows them to share resources with each other. They "talk" by transmitting nutrients to one another through the fungi. For instance, a mother tree, or oldest and strongest tree in the forest, will share some of her sugars with smaller, nearby trees.
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Did you know you can use willow bark for pain relief instead of aspirin?
The secret to pain relief may be in your backyard. For centuries, willow bark has been used as an alternative to aspirin. The active ingredient in the bark, salicyl, turns to salicylic acid and is more gentle on the stomach than over-the-counter aspirin. But before you throw out all of your aspirin, here's 7 household aspirin uses you never knew about.
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Did you know people rarely used to smile in photos?
Why do people smile when they have their photo taken? Smiling in photos is said to have originated from a Kodak advertising scheme that focused on capturing moments of happiness with the product. Since then, it's been the norm to grin into the camera. A study comparing yearbook photos from 1905 to 2005 showed an increase of lip curvature over time. Learn more about why we started smiling—and saying "cheese"—in photos.
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Did you know the longest human neck is over seven inches?
The longest human necks extend to 7.7 inches, belonging to women in the Padaung tribe in the highlands of northwestern Thailand. This is about twice the length of an average human neck. As a cultural practice, the tribe fashions heavy brass rings on a female's neck from the ages of five to nine and add more as she ages. If you're into these "did you know" facts, try some of these random trivia facts you'll wish you knew sooner.
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Did you know tunas tear it up?
Before it became sushi, that tuna could sail through the sea at lightning speed. The fastest speed a tuna can swim has been recorded at over 45 km/h or about 28 mph.
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Did you know the first documentary was staged?
What's widely credited as the first documentary, Nanook of the North, was not true. Most of the film was staged—including its cast and surroundings. Although it "blazed cinematic trails" for its time, most of the film is full of "faking and fudging in one form or another," as said in Criterion.
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Did you know the lighter professional competitive eaters are, the better?
You'd think that the bigger the stomach, the more hot dogs would be able to fit, right? Not quite. Popular Science expanded on the theory that lighter contestants can out-eat their heavier competitors. The reasoning behind this is that a skinny person has room for their stomach to expand without being blocked by a ring of fat. Here are more "did you know" facts about competitive eaters that'll gross you out.
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Did you know Elvis didn't write "Blue Suede Shoes"? 
Instead, the "pioneer of rockabilly music" Carl Perkins wrote the illustrious song that sold two million copies before Presley covered it, according to the LA Times. According to Uncle John's Bathroom Reader Wise Up!, Perkins wrote the song on an old potato sack.
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Did you know the longest breath held underwater is 24:03 minutes? 
That's the typical amount of time it takes to watch one episode of The Office. But in 2016, professional freediver Aleix Segura Vendrell set this world record in a breathtaking attempt (literally). Check out the wackiest world record in every state.
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Did you know lions are identifiable through their whisker patterns?
Like humans and fingerprints, each lion has a whisker pattern unique to their nose, according to the New York Times. Back in the late '60s, researchers conducted a whisker hole identification method that involved overlapping photographs of lions' noses with a standard grid. Here are 60 fun facts about animals you didn't know before.
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Did you know there's a 50,000-word novel without the letter "E"? 
Gadsby is a lipogram, or a novel written without using a letter or letters. In the case of Gadsby, written by Ernest Vincent Wright in 1939, that letter is "E." Check out a fun fact about each letter of the alphabet.
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Did you know you can tell if an egg is old based on whether it floats in water?
It sounds phony, but it's time-tested. If an egg floats when you set it in water, then it's old; if it sinks, it's a fresher egg and you're good to go. If eggs could talk, here's what they would tell you!
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Focused male with closed eyes,Focused male with closed eyes,
Did you know before 1920, some people used to send children in the mail?
Because postage was cheaper than a train ticket, according to Smithsonian, some frugal parents chose this option. Newspapers ran amusing headlines, such as "Baby by Parcel Post" and "Parcel Post Baby Makes Trip Along L & E Railroad." (It's forbidden today.) That's definitely among the craziest things people have ever shipped.
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Did you know blinking could serve as mental rest, not eye lubrication?
The intuitive reason why humans blink so much, 15 to 20 times per minute, is for eye lubrication. But research suggests that it's actually to give our brains a break. Although these breaks only last for a few seconds, they could be giving the brain a chance to go idle and recharge. These 12 "facts" about our brains just aren't true.
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Did you know you can survive in space without a suit?
Well, only for about 15 seconds. It takes that long for humans to lose consciousness in space due to lack of oxygen to the brain. In 1965, a technician was inside a vacuum chamber and accidentally depressurized his suit. After 12 to 15 seconds he lost consciousness, but his suit was repressurized at 27 seconds. According to Scientific American, the man recalled "the moisture on his tongue beginning to boil as well as a loss of taste sensation that lingered for four days following the accident." Here are some more "did you know" facts about space.