Dear Zach, Humans have hair on their heads, arms, and as you mention, even the face. If you feel your face, you might feel some small, fuzzy hairs on your cheeks and forehead. But the hair of your eyebrows is usually a bit thicker. I asked my friend Mark Mansperger why we have eyebrows. He’s an anthropologist at Washington State University. Eyebrows appear to serve two main purposes, he said. One of the purposes of eyebrows is to keep things like rain or sweat from rolling down your forehead and into your eyes. “It guards your eyes in that way,” Mansperger says. Read More ...

Imagine you are home sick from school or are just playing outside when all of a sudden—ah-ah-ah-choo! It might seem like that sneeze came out of nowhere, but a lot of things went on in the brain and body to make it happen. That’s what I found out from my friend Hans Haverkamp, a scientist at Washington State University who is really curious about the human body and how it works. Read More ...

If we traveled around the world, we would see all kinds of dancers. We might see classical ballerinas in Russia. We might see break dancers performing on the streets of New York. We might even see tango dancers in Argentina. While the exact reasons we dance remains a mystery, there are a few theories about it. That’s what I found out from my friend Ed Hagen, an anthropologist at Washington State University who has researched the roots of dance. Read More ...

Without even thinking about it, humans can use their eyes, ears, sense of touch, and brain to keep their balance. But sometimes these senses get a little mixed up. Imagine you are in the car reading your favorite book. All of a sudden the road starts winding. As you look down at your book, your eyes focus on the pages. The book doesn’t appear to be moving, so the eyes send a signal to your brain that you could be sitting still. At the same time, something is stirring in your inner ears. Lots of tiny little hairs called cilium are inside your ears doing an important job. They help you sense how your head is moving in the world. Read More ...