Why Body Hair?

In today's episode Hank talks about hair: What's it good for, what's it made of, and why do we have less than other mammals?

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Sources for this episode:
http://science.howstuffworks.com/life/human-biology/human-body-hair.htm
http://animaldiversity.ummz.umich.edu/site/topics/mammal_anatomy/hair.html
http://www.hair-science.com/
http://www.economist.com/node/21541808
http://www.nytimes.com/2003/08/19/science/why-humans-and-their-fur-parted-ways.html?pagewanted=all&src=pm
http://www.dermnetnz.org/hair-nails-sweat/hypertrichosis.html
http://www.huffingtonpost.com/roger-friedland/women-pubic-hair_b_875465.html
http://www.scientificamerican.com/article.cfm?id=what-is-the-difference-be

Видео Why Body Hair? канала SciShow