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Old 02-03-2010, 08:02 PM
TheJoker
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Quote:
Originally Posted by StreetsDisciple View Post
I thought we could all add in cool and interesting science facts... Ill start.

--Body Hair

We have just as much hair all over our bodies as chimpanzees or monkeys or any other furry primate. Most of it is just very short and light. It's called "vellus hair" or "peach fuzz".Research shows that we humans lost all our body hair through evolution about a million years before somebody finally figured out how to purchase clothes at one of the first primitive Walmarts.

One theory says that we lost our all body hair in an attempt to avoid parasites like ticks, fleas, and lice, and that we've only kept the hair on our heads because other people think it's pretty
Humans (according to the most reliable data) lost their protective fur in conjunction with bipedalism and development of the eccrine sweat glands. Humans are built for endurance running and it was those selective pressures which evolved our abundance of eccrine glands because the watery sweat dissipates heat far better than the apocrine glands which are abundant in chimpanzees. The loss of fur accelerates the cooling process. Better body temperature regulation also helped the development of the human brain (the most temperature sensitive organ in the human body).

The aquatic ape and lice theories don't account for all the evidence. Temperature regulation is the most complete theory so far.

On a side note we don't have "as much hair", we have "as many hair follicles".
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