The shape of hair follicles determines whether human hair is curly or straight.
Got scars? As you've no doubt noticed, scar tissue is distinct from normal skin. It's more taut, and it's hairless. Learn more on this Moment of Science.
Your face might be home to a group of tiny creatures! These organisms, called demodicids, or eyelash mites, live on the bodies of even the cleanest of people.
You probably imagine that your ears are rather passive, but they can play a surprisingly active role too. Learn more on this Moment of Science.