The Body

This mysterious little body part is a surprising source of controversy among researchers.

2. Hot testicles can cause health and fertility problems.

Smoking can cause breasts to droop, but breastfeeding doesn't.

Though you might not often think about them, lymph nodes are crucial for your immune system.

At its largest point, the sciatic nerve is about as big around as a man's thumb—plenty big enough to be an important part of the nervous system.

Let's go for the jugular.

It's not your sweat that stinks.

Did you know opposable thumbs may have played a role in the development of language?

Without this crucial joint, many daily activities would be impossible.

Your stomach may very well be a key player in keeping your mood balanced.

3. Once a year, have a professional look at it.

This butterfly-shaped gland influences every cell in your body.

Your tongue isn't just important for tasting. Here are a few underappreciated facts about the most flexible muscle in your body.

We're still learning about one of the most important structures of the brain.

You're probably aware of some vestigial body parts, like wisdom teeth, that the human body doesn't really need. But did you know there are several muscles in that category as well?

8. You might want to rethink an ankle tattoo.

3. You can walk without a kneecap.

9. Surgeons can make thumbs out of big toes.

The brain is arguably the one organ that makes you who you are—and the largest part of the brain is the neocortex.

Because your nostrils split their workload.

5. You can live without it.

You may know it as just an olfactory bump on your face, but the human nose is a pretty surprising organ. For example: plastic surgeons can regrow your nose—on your forehead.

At only 3 inches long and weighing about 60 grams, the uterus isn’t a flashy, attention-grabbing organ. But it is pretty amazing.

Ever wonder how many times people sneezed in a year?

7 Surprising Facts About the Chin

10 Vital Facts About the Scrotum

7 Surprising Facts About the Breast

11 Interesting Facts About Lymph Nodes

13 Facts About the Sciatic Nerve

11 Striking Facts About the Jugular

13 Surprising Facts About the Armpit

11 Facts About the Thumb

10 Things You Might Not Know About the Elbow

8 Surprising Facts About the Stomach

13 Fundamental Facts About the Anus

11 Eye-Opening Facts About the Thyroid

10 Flexible Facts About the Tongue

7 Amazing Facts About the Amygdala

5 Muscles You Might Be Missing

8 Facts About the Ankle

7 Facts About Your Knees

10 Stubbed Facts About Your Big Toe

9 Brainy Facts About the Neocortex

Why Does Your Nose Get Stuffy One Nostril at a Time?

7 Filtered Facts About the Unappreciated Spleen

8 Surprising Facts About Your Nose

The Uterus: A Natural History

The Man Who Has Been Counting His Sneezes for 8.5 Years