Why does our hair turn white?

Humans have so many different hair colors – black, brown, red, blonde – and almost every shade in between. As we get older, our hair usually starts to lose its color. But why is that? We asked Dr. Emily Downing to help us find the answer. 

Got a question that’s pretty hairy? Send it to us at BrainsOn.org/contact, and we’ll answer it in style.