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Is there any evolutionary benefit to humans retaining thick hair in only certain places (such as head, groin, armpits, face in males)?

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When carrying a small, warm object in cool air, is it best to cover as much as possible with the hands or leave as much as possible exposed to the air?

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Are there any significant, nonrandom temperature differences within cells?

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Is it true that humans have some of the best directional hearing of any animal?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Is there any evolutionary benefit to humans retaining thick hair in only certain places (such as head, groin, armpits, face in males)?	1
When carrying a small, warm object in cool air, is it best to cover as much as possible with the hands or leave as much as possible exposed to the air?	1
Are there any significant, nonrandom temperature differences within cells?	1
Is it true that humans have some of the best directional hearing of any animal?	1