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Why can't some animals not sweat?
Question Date: 2016-08-31
Answer 1:

Humans have glands in our skin that excrete sweat. We can only sweat because we have these glands. Not all animals do. Evolution hasn't provided them with glands, usually because they don't need them: either they live in parts of the world where sweating isn't helpful, or they have other means of staying cool, like panting.

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