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Old 10-02-2010, 10:38 PM  
rowan
Too lazy to set a custom title
 
Join Date: Mar 2002
Location: Australia
Posts: 17,393
The question should probably be rephrased as something like "why don't humans have almost ALL hair like every other mammal?"

The answer is that our brains are so large that they need an efficient cooling system, and a good lining of fur would impede our ability to evaporate sweat.
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