The anus isp evolt multiple times independently. The sea cucumber can shoot internal organs out at you through its anus and demand itself that way. There are more than 1,000 species of anis in the world.
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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