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A brief (scientific) history of butts

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Hold on to your butts. The science and evolutionary history of your rear end, the down-low on your derriere, shining a little light where the sun don't shine… you get the picture. But(t) seriously, we don't talk about this all-important hole enough. It’s Okay To Be Smart digs into how, from an evolutionary perspective, it might be the most important orifice on your body.

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