26 Fascinating Facts About the Human Body

Ridofranz/iStock via Getty Images Plus
Ridofranz/iStock via Getty Images Plus

You may not think about it very often, but there's so much to learn about the human body. For instance, did you know that people are actually covered in invisible stripes? In this article, which was adapted from an episode of The List Show, we take a look at some fascinating facts about the human body you might not know.

1. Only humans have chins.

Humans are the only animals with chins. While you may think every animal has one, that’s just what we tend to call the bottom of the head. But in reality, a chin is a very specific bone feature that extends forward from the lower jaw. Some experts propose that elephants and manatees have chins, but others argue that they’re such fundamentally distinct structures they shouldn’t be compared to humans. Experts still aren’t sure why people evolved to have chins; the reason might have to do with eating or speaking, or they may just have emerged as a side effect from some other useful feature.

2. Humans have a strange bone called the hyoid.

A peculiar bone humans have is the hyoid. This is the one bone that doesn’t form a joint with another bone. Instead, it’s connected to muscles and ligaments. The hyoid sits between the jaw and the voice box and it’s used to keep all the lower mouth muscles in place. It also helps with swallowing and talking.

3. People that have more hair and innie belly buttons are more prone to lint.

Hairy people with innie belly buttons are more prone to belly button lint, which comes from fibers that rub off of clothing over time. Your stomach hair grabs onto the fibers and pulls them into your belly button.

Starting in 2011, a group of scientists started the Belly Button Biodiversity Project to learn about what's going on inside these little caves of mystery, and as it turns out, it's quite a lot. Samples from about 60 people revealed over 2300 total species of bacteria. And of those, only eight were identified as common, appearing in over 70 percent of belly buttons.

4. While it varies person to person, fingernails grow faster than toenails.

Your fingernails grow faster than your toenails. Though it varies from person to person, typically, fingernails grow about a tenth of a millimeter each day, while toenails grow at around half that pace. There’s a correlation between nail growth speed and the length of the nearest bone. This means that your longest fingers have faster-growing nails than your shorter fingers.

5. Fingernails grow faster on your dominant hand.

Your fingernails grow faster on the hand that you write with. No one knows why.

6. As you age, your nails change.

Specifically, they grow more slowly and then nail cells, known as onychocytes, start accumulating. That’s why older people have thicker toenails. Fingernails aren’t as noticeably different because people manage them better, plus our toes endure a lot of damage throughout our lives.

7. It's a misconception that people's hair and nails continue to grow after they die.

What’s actually happening is the skin dehydrates and then recedes. So it looks like the hair and nails are getting longer, but in reality it's actually the skin that's getting shorter.

8. Breastfeeding will not cause breasts to sag.

It's a common misconception that breastfeeding causes breasts to sag. Pregnancy itself might affect breasts in that they may stretch and then recover differently. But research on breastfeeding confirms it will not cause breasts to sink. A behavior that will, though, is smoking.

9. Hands and feet contain over half the bones in an adult body.

With around 27 bones in each of your daddles—that’s an old slang word for the hands—and about 26 bones in each of your plates of meat—which is another old slang term for feet—these appendages account for over half of an adult’s bones, of which there are around 206 total. But that’s not always true. Feet mostly contain cartilage at birth, then bones form over time. They don’t fully harden until humans are in their early twenties.

10. You can fracture a rib just by sneezing.

While it's rare, it is possible to fracture a rib by sneezing. In 1885, there was an article in the Journal of the American Medical Association about a 72-year-old man who fractured his eighth rib while sneezing. Sneezer, by the way, is a 1940s Australian slang term meaning “excellent, wonderful,” which could definitely describe a good sneeze—but probably not one that would break a rib.

11. You can see stars if you rub your eyes.

If you've ever seen stars while rubbing your eyes, you’re not imagining it. The cells in our eyes are interpreting the pressure as an input, and treat that the same way they’d treat a light input.

12. Goosebumps are pretty much useless.

Goosebumps are frequently associated with adrenaline being released in the body, like when we’re feeling a particularly strong emotion, for example. They used to be important when people had way more hair on their bodies because goosebumps would elevate that hair and make a person look bigger when they were in danger. But now, they’re a pretty useless feature.

13. Spleens help the immune system.

The spleen is surprisingly not totally useless even though that was the belief up until the 1950s. It’s OK to get your spleen removed, but it does assist the immune system. While blood is in the spleen, the immune system creates the necessary antibodies to fight bacteria in that blood. A fetus’s spleen also creates red blood cells.

14. The appendix seems to help the immune system.

It's OK to get your appendix removed, but the organ also aids the immune system. In 2018, Dr. Mohamad Abouzeid, assistant professor and attending surgeon at NYU Langone Health told Mental Floss, "[The appendix] has a high concentration of the immune cells within its walls." Experts don't know exactly how the appendix affects the immune system, but it seems to play some role in keeping us healthy.

15. A fetus's face forms in the first three months after conception.

During the first three months after conception, a fetus’s face comes together, fusing in the area of the top of the lip. That means the dent under the nose, which is called the philtrum, is evidence of a person's time in the womb.

16. Babies don’t just see in black and white.

A newborn baby has pretty terrible vision. But it’s not true that they can only see in black and white. In reality, if there’s a large amount of the color red, they can identify it, but only if it appears in front of gray. Newborns have about 5 percent of the visual acuity that adults do, but it improves quickly and takes only around six months before they can see about as well as a grown-up. Though there are some eye tests that babies can school adults on, which are ones centered around subtlety. For example, up until 6 months old, a baby can tell monkeys apart, while older babies and adults can’t do that.

17. The liver is very good at regenerating itself.

In fact, with just 25 percent of the original liver tissue, it can regenerate. Liver transplants are generally only needed if someone has experienced severe damage to the organ or an injury.

18. Some people are born with three kidneys.

Some people had a kidney split while they were still in the womb, so they're actually born with three. This makes them prime candidates for donation, but the problem is people often don't know when they have three kidneys.

19. A person's large intestine can be stretched 5 feet and the small intestine can stretch 20 feet.

The intestines are pretty long: The small intestine stretches to about 20 feet and the large intestine hits 5 feet. The surface area of your intestines could take up two entire tennis courts, although some Swedish researchers have downgraded it to studio apartment size. Compare that with a blue whale, though, which has over 700 feet worth of intestines.

20. The stomach can hold up to 50 fluid ounces.

The stomach may not be tennis court size, but it can hold around 16 to 50 fluid ounces. It's interesting to note that a Trenta size at Starbucks is 31 fluid ounces, which is more than many adult stomachs can technically hold.

21. The neurotransmitter serotonin can be found in the gut.

Our gut contains 95 percent of the neurotransmitter serotonin. In fact, the gut, with its 100 million neurons, is so important to mood that it’s sometimes called the “second brain.” Medications that affect serotonin will often also cause GI issues.

22. The skin is the largest organ.

The skin is considered an organ and it's the body's largest one. An adult may have 22-square feet of skin on their body. Basically that means your skin could comfortably stretch across half the floor of the typical bathroom.

23. The skin makes up a large part of your body weight.

Fifteen percent of your total body weight, to be exact.

24. The ovaries are in communication with the brain.

It was once believed that the ovaries and uterus sort of sat dormant until they were needed, but the ovaries actually communicate with the brain in ways we’re just learning about. The hypothalamus and ovaries work together to make sure that the levels of hormones in the ovaries, like estrogen and progesterone, are where they need to be.

25. Humans are covered in stripes.

The human body is covered in stripes called Blaschko’s Lines, which are typically invisible. They’re cellular relics of our development from a single cell to a fully formed human.

26. Humans glow, but our eyes aren't able to detect it.

Humans glow, but it’s just around 1000 times weaker than our eyes can detect. Every animal that has metabolic reactions glows because in that process, photons get emitted, causing light. In 2009, a study was published in which a camera captured the bioluminescence of five men. According to that study, our upper body lights up the strongest. And the glow is on a cycle; when we’re on a normal sleep schedule, our bioluminescence is at its strongest at about 4 p.m.

The 10 Best Air Fryers on Amazon

Cosori/Amazon
Cosori/Amazon

When it comes to making food that’s delicious, quick, and easy, you can’t go wrong with an air fryer. They require only a fraction of the oil that traditional fryers do, so you get that same delicious, crispy texture of the fried foods you love while avoiding the extra calories and fat you don’t.

But with so many air fryers out there, it can be tough to choose the one that’ll work best for you. To make your life easier—and get you closer to that tasty piece of fried chicken—we’ve put together a list of some of Amazon’s top-rated air frying gadgets. Each of the products below has at least a 4.5-star rating and over 1200 user reviews, so you can stop dreaming about the perfect dinner and start eating it instead.

1. Ultrean Air Fryer; $76

Ultrean/Amazon

Around 84 percent of reviewers awarded the Ultrean Air Fryer five stars on Amazon, making it one of the most popular models on the site. This 4.2-quart oven doesn't just fry, either—it also grills, roasts, and bakes via its innovative rapid air technology heating system. It's available in four different colors (red, light blue, black, and white), making it the perfect accent piece for any kitchen.

Buy it: Amazon

2. Cosori Air Fryer; $120

Cosori/Amazon

This highly celebrated air fryer from Cosori will quickly become your favorite sous chef. With 11 one-touch presets for frying favorites, like bacon, veggies, and fries, you can take the guesswork out of cooking and let the Cosori do the work instead. One reviewer who “absolutely hates cooking” said, after using it, “I'm actually excited to cook for the first time ever.” You’ll feel the same way!

Buy it: Amazon

3. Innsky Air Fryer; $90

Innsky/Amazon

With its streamlined design and the ability to cook with little to no oil, the Innsky air fryer will make you feel like the picture of elegance as you chow down on a piece of fried shrimp. You can set a timer on the fryer so it starts cooking when you want it to, and it automatically shuts off when the cooking time is done (a great safety feature for chefs who get easily distracted).

Buy it: Amazon

4. Secura Air Fryer; $62

Secura/Amazon

This air fryer from Secura uses a combination of heating techniques—hot air and high-speed air circulation—for fast and easy food prep. And, as one reviewer remarked, with an extra-large 4.2-quart basket “[it’s] good for feeding a crowd, which makes it a great option for large families.” This fryer even comes with a toaster rack and skewers, making it a great addition to a neighborhood barbecue or family glamping trip.

Buy it: Amazon

5. Chefman Turbo Fry; $60

Chefman/Amazon

For those of you really looking to cut back, the Chefman Turbo Fry uses 98 percent less oil than traditional fryers, according to the manufacturer. And with its two-in-one tank basket that allows you to cook multiple items at the same time, you can finally stop using so many pots and pans when you’re making dinner.

Buy it: Amazon

6. Ninja Air Fryer; $100

Ninja/Amazon

The Ninja Air Fryer is a multipurpose gadget that allows you to do far more than crisp up your favorite foods. This air fryer’s one-touch control panel lets you air fry, roast, reheat, or even dehydrate meats, fruits, and veggies, whether your ingredients are fresh or frozen. And the simple interface means that you're only a couple buttons away from a homemade dinner.

Buy it: Amazon

7. Instant Pot Air Fryer + Electronic Pressure Cooker; $180

Instant Pot/Amazon

Enjoy all the perks of an Instant Pot—the ability to serve as a pressure cooker, slow cooker, yogurt maker, and more—with a lid that turns the whole thing into an air fryer as well. The multi-level fryer basket has a broiling tray to ensure even crisping throughout, and it’s big enough to cook a meal for up to eight. If you’re more into a traditional air fryer, check out Instant Pot’s new Instant Vortex Pro ($140) air fryer, which gives you the ability to bake, proof, toast, and more.

Buy it: Amazon

8. Omorc Habor Air Fryer; $100

Omorc Habor/Amazon

With a 5.8-quart capacity, this air fryer from Omorc Habor is larger than most, giving you the flexibility of cooking dinner for two or a spread for a party. To give you a clearer picture of the size, its square fryer basket, built to maximize cooking capacity, can handle a five-pound chicken (or all the fries you could possibly eat). Plus, with a non-stick coating and dishwasher-safe basket and frying pot, this handy appliance practically cleans itself.

Buy it: Amazon

9. Dash Deluxe Air Fryer; $100

Dash/Amazon

Dash’s air fryer might look retro, but its high-tech cooking ability is anything but. Its generously sized frying basket can fry up to two pounds of French fries or two dozen wings, and its cool touch handle makes it easy (and safe) to use. And if you're still stumped on what to actually cook once you get your Dash fryer, you'll get a free recipe guide in the box filled with tips and tricks to get the most out of your meal.

Buy it: Amazon

10. Bella Air Fryer; $52

Bella/Amazon

This petite air fryer from Bella may be on the smaller side, but it still packs a powerful punch. Its 2.6-quart frying basket makes it an ideal choice for couples or smaller families—all you have to do is set the temperature and timer, and throw your food inside. Once the meal is ready, its indicator light will ding to let you know that it’s time to eat.

Buy it: Amazon

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15 Facts About Babe On Its 25th Anniversary

James Cromwell in Babe (1995).
James Cromwell in Babe (1995).
Universal Pictures Home Entertainment

It's hard to believe that it has been 25 years since a tiny pink piglet named Babe stole the heart of audiences around the world, and turned many of them into lifelong vegetarians (more on that later). What’s almost even harder to believe is that the heartwarming story of a pig who wants to be a sheepdog was partially ushered into existence by George Miller, the same man who brought us the Mad Max franchise. Here are 15 things you might not know about the little piggy that could.

1. James Cromwell thought the original idea for Babe was silly.

When actor James Cromwell first heard about Babe, which is based on Dick King-Smith's novel, “I thought it sounded silly,” he told Vegetarian Times. “I was mostly counting the lines to see how much of a role the farmer had.”

2. Farmer Hoggett has just 16 lines in Babe.

But by that point, Cromwell was already sold on the script, intrigued by what he called the “sophisticated yet pure-of-heart piglet.” And he clearly made the right call: The part earned Cromwell an Oscar nomination for Best Supporting Actor.

3. It took 48 different pigs to play the role of Babe.

Because pigs grow quickly, the crew utilized four dozen Large White Yorkshire piglets throughout the course of filming, shooting six at a time over a three-week period. A total of 48 pigs were filmed, though only 46 of them made it to the screen.

4. Babe also featured one animatronic pig.

Animal trainer Karl Lewis Miller seemed almost embarrassed to admit that they did have one animatronic pig play Babe, too. This is the pig they used for wide shots—when there was at least 15 feet surrounding Babe all the way around, and no place for Miller to hide.

5. Babe is a girl.

While this is never explicitly stated in the movie, because a male pig’s private parts would have been visible on film, all of the pigs used for filming were females.

6. In all, there were 970 animals on the set of Babe.

Universal Pictures Home Entertainment

In an interview with Entertainment Weekly, Karl Lewis Miller—who had 59 people assisting him—said that, all told, there were 970 animals used for the film, though only 500 of them actually made it into the movie. This included pigs and dogs, of course, plus cats, cows, horses, ducks, goats, mice, pigeons, and sheep, too. Baa-ram-ewe indeed!

7. Babe is also Dexter from Dexter's Laboratory.

In addition to voicing Babe, voice actor Christine Cavanaugh—who passed away in December 2014—lent her vocal chords to more than 75 projects over the years, including the title role in Dexter’s Laboratory, Chuckie Finster on Rugrats, and Gosalyn Mallard on Darkwing Duck.

8. Babe was banned in Malaysia.

Not wanting to upset its Muslim community, to whom pigs are haram, Malaysia banned the family flick from screening in its theaters. But its proscription didn’t stick; the film was released on VHS about a year later.

9. Pork product sales dropped in 1995.

Universal Pictures Home Entertainment

In December 1995, just four months after Babe hit theaters, Vegetarian Times ran a story about the problems facing the pork industry. Among the factors contributing to the industry’s slump, according to writer Amy O’Connor, was “the motion picture Babe, featuring an adorable porcine protagonist and a strong vegetarian message.” She went on to note that, “This year, the U.S. Department Agriculture showed stagnant demand for pork, while retail sales of canned meats such as Spam hit a five-year low.”

10. Sales of pet pigs increased following the release of Babe.

In The Apocalyptic Animal of Late Capitalism, author Laura Elaine Hudson is unable to substantiate claims that pork sales dropped a full 25 percent in the U.S. following the release of Babe, as some sources claimed, but she did find that sales of pet pigs increased—as did, eventually, the number of abandoned pigs.

11. Babe turned many viewers into vegetarians.

Babe’s popularity—and its main character’s adorableness—led to many fans of the movie (particularly young viewers) adopting a vegetarian lifestyle. The practice became so widespread that it was dubbed “The Babe Effect,” and fans of the film who went meatless became known as “Babe vegetarians.”

12. James Cromwell is a "Babe vegan."

Among those individuals whose eating habits were altered by Babe was the movie’s human star. Though he had been a vegetarian decades before, Cromwell “decided that to be able to speak about this [movie] with conviction, I needed to become a vegetarian again.”

13. Mrs. Hoggett was aged up for Babe.

Magda Szubanski stars in Babe (1995).Universal Pictures Home Entertainment

Magda Szubanski, who plays the farmer’s wife Esme, was only 34 years old at the time of the film’s release. She logged lots of time in the makeup chair in order to pass as the wife of her then-55-year-old co-star.

14. Jerry Goldsmith was hired to score Babe, but was replaced.

Jerry Goldsmith wrote a good deal of the music for Babe, but he and George Miller’s ideas for what it should sound like did not mesh. So Goldsmith was replaced by Nigel Westlake.

15. Babe earned a Best Picture Oscar nomination.

Among Babe's seven Academy Award nominations (yes, seven) was a nod for Best Picture, which pit the pig film against an impressive lineup that included Sense and Sensibility, Il Postino, Apollo 13, and Braveheart (which took home the award). The film did win one Oscar: it beat out Apollo 13 for Best Visual Effects.

This story has been updated for 2020.