askscience

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Why do apes and other animals bare their teeth when angry or distressed but humans show theirs when smiling?

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1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why do apes and other animals bare their teeth when angry or distressed but humans show theirs when smiling?	1
Why don't babies feel the instinct to cry in the womb?	1
What would a plague of frogs like in the story of the Plagues of Egypt do?	1