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So, why do women go through it - and are there evolutionary benefits?

Some have theorized that this may be an evolutionary trait built in to provide humans with a reward for being able to outrun predators and stay fit.

In Pokémon, you use an evolutionary stone to level up, right?

On a more philosophical level, Klaas writes that it’s a “tragic mistake” to believe that “’survival of the fittest’ — with overtones of relentless, flawless optimization” fairly describes evolutionary principles.

Since then, they have helped primatologists, evolutionary biologists, and scientists of all kinds better understand primate behavior in a unique natural laboratory setting.