Eyebrows and Eyelashes

You all know what eyebrows are. But do you know what eyebrows are for?

The main function of the eyebrow is to prevent moisture, mostly salty sweat and rain, from flowing into the eye. The arch of your eyebrows sends sweat and rain to the sides of our heads instead of directly into our eyes. This is especially important for sweat, because the salt in sweat can really sting your eyes.

Similarly our eyelashes protect the eyes from debris and provide a warning that an object such as an insect or dust mite is near the eye.

Here's more about eyebrows and eyelashes.