THE 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.

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.

3. Birth to age 3 sees the fastest rate of brain development in the entire human lifespan.

Up to 35 percent of the population experience this sneezy reaction to bright light.

Technically? Yes. But your nose probably doesn't have the power to steal an entire smell.

Let the zebras and tigers have their stripes. Humans have our own—they're called Blaschko's Lines.

When you cut your skin, your body knows exactly what to do in order to heal the pesky wound as fast as possible. Eventually, a brownish rust colored scab forms over the cut. But what is a scab made of, and why do they just fall off?

The uvula is one of the weirdest looking features of the human body. Yet despite its infamy, scientists have spent centuries puzzling over its function.