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Human Body

The human body is an amazing structure made up of many fascinating parts and systems. Learn about the human body and how its systems work together.

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Is it possible to get taller as an adult?

Tired of standing on tiptoes when you pose for a photo with friends? If you're an adult looking to add a few inches to your frame, you might be out of luck.

Is it possible to swallow your tongue?

The human tongue is essential for speaking and eating ice cream. Ever worry about swallowing yours? We can put that concern to bed.

Can holding in a sneeze kill you?

In some settings, you just can't heave a giant sneeze. If you hold back during a meeting or date, you're exhibiting decorum. Could you also be making a death wish?

Why doesn’t your tongue get infected when you bite it?

There's nothing worse than biting your tongue. Unless it swells up and gets infected — thankfully it's pretty rare. See why.

What is mucus made of?

It's hard to imagine being thankful for mucus when you've got a nose full of it, but if it all went away you'd really be in trouble.

When you smell poop are you actually inhaling poop molecules?

Smelling fecal matter is gross enough, so the possibility that tiny bits of poop are actually getting into your nose is outright disgusting.

Where does earwax come from?

Earwax might seem like just another gross bodily substance, but it serves a very important function in the health of your ear canal.

Why is baby poop so smelly?

Tiny little babies are so sweet and cuddly. That is until you have to change their poopy diaper. What in the world is it that makes their poop so foul?

How do boogers form in your nose?

Boogers are more than an annoyance. Your body makes them for a very specific purpose — and it's not to gross out other people.

How fast does a fart travel?

We all pass gas, but not all of us like to talk about it — or study it to figure out how quickly it travels out of the body.

What are eye boogers?

As you're wiping away the crust from your eyes in the morning, do you ever ponder why it forms in the first place?

What are some safe ways to remove earwax?

Any doctor will tell you not to stick a cotton swab in your ear, although most of us disregard the warning. Luckily, there are safer ways to remove earwax.

What happens when you hold in a fart?

We're taught that it's impolite to pass gas in front of others, but could holding it in cause you health problems?

Is there a health benefit to picking your nose?

They say there are two types of people who pick their nose – those who do and those who lie about doing it. Would you be more prone to admit it if you found out it might be good for you? Let's see if it is.

Does mouthwash affect your immune system?

A swish of mouthwash after brushing makes our mouths feel fresh and clean. But some scientists think your mouthwash could be hurting your immune system. Is there something sinister lurking in your oral care routine?

Why don't women have Adam's apples?

One of the world's most enduring questions – besides "why do men have nipples?" – is "why don't women have Adam's apples?" The answer isn't as simple as you might think.

Why are some people more ticklish than others?

Were you ever subjected to "tickle torture" from an older sibling? If you're feeling uncomfortable right now, you might be more sensitive to the dreaded tickle monster than the rest of us.

Why do farts stink?

Everybody poops, and everybody passes gas. And guess what? Neither smell good. We'll explain why.

Why do we have boogers?

Your mom always told you not to pick them, but you really have no idea why. So what's up with the nasty, snotty invaders camping out in your nose?

Why do I get gassy when I fly?

You're at cruising altitude, on your way (finally) to your vacation destination, when you realize that your bloated feeling is about transform into an assault on your seat mates. Why does this always seem to happen?

How Does Measles Reset Your Immune System?

Research shows that getting measles leaves you vulnerable to other infectious diseases until your body rebuilds its immunity, and that can take several years.

Have doctors ever found teeth in a vagina?

Vagina dentata is the stuff of legends — but is it possible for a woman to have teeth in her vagina? The answer might surprise you.

Is your foot really the same length as your arm from wrist to elbow?

You can test this pretty easily for yourself, but does it hold true for most people? Da Vinci has the answer.

Is it dangerous to stifle a sneeze?

Sneezing at the wrong moment can be downright dangerous — they've even been blamed for car accidents. But could stifling a sneeze be just as bad?

Is there a right way to poop?

Of course we all know how to poop. But you might be missing out on a faster, healthier, more efficient way to do it.

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