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Unexplainable

Getting to the bottom of butts

Unexplainable
Unexplainable
Once upon a time, there were no anuses. These ingenious organs allowed our primordial ancestors to grow bigger and more complex, but scientists still don’t understand how they evolved. And they’re still grasping at a mystery that literally surrounds it: Why is the human butt so big?
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Unexplainable
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