Does Hair Ever Stop Growing?

Have you ever wondered why the hair on your head will continue to grow, but your leg hair doesn't? Join Hank Green for a new episode of SciShow and discover the answer!
----------
Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Christopher Prevoe, Justin Ove, John Szymakowski, Peso255, Ruben Galvao, Fatima Iqbal, Justin Lentz, and David Campos.
----------
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow

Or help support us by becoming our patron on Patreon:
  / scishow  
----------
Looking for SciShow elsewhere on the internet?
Facebook:   / scishow  
Twitter:   / scishow  
Tumblr:   / scishow  
Instagram:   / thescishow  

Sources:http://www.webmd.com/skin-problems-an...
https://www.aad.org/dermatology-a-to-...
http://www.loc.gov/rr/scitech/mysteri...
http://physrev.physiology.org/content...
http://www.livestrong.com/article/109...
http://stemcells.nih.gov/info/basics/...
http://physrev.physiology.org/content...
http://news.yale.edu/2011/09/01/yale-...