Why Does Hair Grow The Way It Does?
Viewers like you help make PBS (Thank you đ) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Try CuriosityStream today: http://curiositystream.com/smart Donât miss our next video! SUBSCRIBE! âșâș http://bit.ly/iotbs_sub âââMore info and sources below âââ Check out more of my friend Kyleâs sweet hair on his channel âBecause Scienceâ: https://www.youtube.com/playlist?list=PLl4T6p7km9dZSdTfPxucpwZY7Try86hFW All mammals have hair at some point in their lives, but none of them wear it quite like humans. Why does our hair grow where it does, and not grow where it doesnât? How does our hair get its color? And why does it go gray and often fall out when we get older and go bald? Learn all about the science of human hair in this weekâs video! ----------- REFERENCES: Harding RM, Healy E, Ray AJ, et al. Evidence for Variable Selective Pressures at MC1R. American Journal of Human Genetics. 2000;66(4):1351-1361. Randall, Valerie Anne. "Androgens and hair growth." Dermatologic therapy 21.5 (2008): 314-328. Yablon, J. "What is the latest theory of why humans lost their body hair?." SCIENTIFIC AMERICAN 297.3 (2007): 124-124. APA ----------- FOLLOW US: Merch: https://store.dftba.com/collections/its-okay-to-be-smart Facebook: http://www.facebook.com/itsokaytobesmart Twitter: @okaytobesmart @DrJoeHanson Tumblr: http://www.itsokaytobesmart.com Instagram: @DrJoeHanson Snapchat: YoDrJoe ----------- Itâs Okay To Be Smart is hosted by Joe Hanson, Ph.D. Director: Joe Nicolosi Writer: Sarah Keartes Producer/editor/animator: Andrew Matthews Producer: Stephanie Noone and Amanda Fox Produced by PBS Digital Studios Music via APM Stock images from Shutterstock http://www.shutterstock.com