Genitals are the fastest-evolving organs in the animal kingdom. Here’s why:

Genitals are weirdly shaped, which is strange. They only really NEED to be a pipette like device to inject sperm into a cup like device. But what we see in nature is way more complicated and bizarre. The reason? “They’re the result of a furious evolutionary tango of sex, that has been going on of millions of years.” Check out this cool video from TED-Ed to marvel at how odd genitalia are:

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