Animals can sleep on the wing, standing up, sitting in a tree or diving in the ocean. Many don’t close their eyes, and some don’t even have eyelids. Here are some of the strangest ways to snooze.
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Animals can sleep on the wing, standing up, sitting in a tree or diving in the ocean. Many don’t close their eyes, and some don’t even have eyelids. Here are some of the strangest ways to snooze.
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