Why Do We Have Eyebrows?

Eyebrows are prominent human features, but what purpose do they serve? Scientists think they help keep stuff out of our eyes and aid in nonverbal communication, among other things. Learn more about eyebrows in this episode. Whether the topic is popcorn or particle physics, you can count on the HowStuffWorks team to explore - and explain - the everyday science in the world around us on BrainStuff. Watch More BrainStuff on TestTube http://testtube.com/brainstuff Subscribe Now! http://www.youtube.com/subscription_center?add_user=brainstuffshow Watch More http://www.youtube.com/BrainStuffShow Twitter http://twitter.com/BrainStuffHSW Facebook http://facebook.com/BrainStuff Google+ http://gplus.to/BrainStuff Watch More of Cristen on Stuff Mom Never Told You: http://www.youtube.com/stuffmomnevertoldyou