Why do we have eyebrows?

When humans evolved and shed our extra hair, our eyebrows managed to stay behind. Why? Scientists aren't exactly sure but can offer a few reasons.

The arch shape of our eyebrows absorbs sweat and rain that would enter our eyes, keeping our eyes somewhat dry. The slant of the hairs divert the water sideways. This is good, of course, because the salt in our sweat stings the eyes and water in general impairs our vision.

But how did that happen? Well, our early ancestors either hunted or were being hunted almost everyday. Imagine all that sweat dripping down your forehead and into your eyes, eventually leading you to death (animal ate you) or starvation (you missed the damn animal, which would probably lead you to death, anyway). Nature has a way of selecting the humans who have eyebrows over the ones who don't.

Most scientists, however, believe that if we didn't have eyebrows then evolution would have compensated us with other possibilities. Extra thick eyelashes or protruding skulls that form a ledge above our eyes could have been feasible solutions. Let's just be thankful for what we received.