You ever think how weird sleep is? And how almost all animals have to do it? Could it be a unique behavior to life on Earth? | Poal: Say what you want.

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You ever think how weird sleep is? And how almost all animals have to do it? Could it be a unique behavior to life on Earth?

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[–] • 1 pt

Almost all? What animal doesn't sleep?

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[–] • 2 pts

There are many animals that go into some sort of very low energy periods, like fish.

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