Why has same-sex sexual behavior persisted during evolution?

Same-sex sexual behavior may seem to present a Darwinian paradox. It provides no obvious reproductive or survival benefit, and yet same-sex sexual behavior is fairly common—around 2-10% of individuals in diverse human societies—and ...

Where do the gender differences in the human pelvis come from?

The pelvis is the part of the human skeleton with the largest differences between females and males. The female birth canal is on average more spacious and exhibits shape features that enable birth of a large baby with a ...

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