Home / Series / SciShow / Aired Order / Season 2015 / Episode 72

How Does Hair Know When to Stop Growing?

The hair on your scalp can get really long, but your leg hair doesn’t sweep the floor. Why not?

English
  • Originally Aired May 19, 2015
  • Runtime 10 minutes
  • Network YouTube
  • Created August 5, 2018 by
    Administrator admin
  • Modified August 5, 2018 by
    Administrator admin