- There are as many hairs per square inch on your body as a chimpanzee.
- Human hair is virtually indestructible. Aside from it’s flammability, human hair decays at such a slow rate that it is practically nondisintegrative. Hair cannot be destroyed by cold, change of climate, water, or other natural forces and it is resistant to many kinds of acids and corrosive chemicals. (http://www.lifesmith.com/VHS%20Web/humanbody.html
See also : http://www.economist.com/node/21541808