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        Part of It's Okay To Be Smart
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        Why Do We Have to Sleep | It's Okay to Be Smart

        Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we have do it. Here’s a look at how sleep works, why we’re not getting enough sleep, what happens if you DON’T sleep, and an idea about where sleep came from in the first place.

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