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Q.

Why have humans evolved to have less body hair than apes?

Tags: sex, health, beauty & fashion
Asked by The abuser, 21 Sep '13 05:31 pm
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Answers (3)

 
1.

The only hairs that humans have completely lost are the vibrissae, or sensory whiskers. The rest of our bodies are actually covered with very short, very fine hair called vellus. The difference between humans and apes lies in the relative proportions and distribution of vellus hair compared with our longer, darker hair (known as terminal hair). There have been many different attempts to explain the relative hairlessness of humans, but so far none have achieved general consensus. It has been suggested that our hair was lost during a semi-aquatic period of our prehistory, that it was lost to allow improved cooling from sweating on the hot African savannah and even that we didnt lose our hair until Neanderthal man started wearing clothes years ago. This is all speculative however as hair doesnt fossilise well so we dont even know for sure if hairlessness is unique to humans.
Answered by Ataur Rahman, 21 Sep '13 05:33 pm

 
  
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2.

We are the naked ape! Compared to other apes, we have much less hair.
There are several theories. One is that we needed to loose heat when we moved to a Savanah environment and became bipedal runners.
But the theory I find most engaging is that of the aquatic ape - that we went through a semi-aquatic stage of development. This actually has quite a lot going for it, our hair pattern is similar to marine mammals, and a marine diet could have contributed to brain size development!
Answered by anil garg, 21 Sep '13 09:00 pm

 
  
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3.

Field to cave.
Answered by MAdhavan Avadhany, 21 Sep '13 08:02 pm

 
  
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