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Submission + - Why humans have pretty much stopped evolving (npr.org) 2

Kidipede writes: "Never thought of this before, but Ian Tattersall explains that organisms can evolve quickly only in small isolated groups with a limited gene pool, so that a mutation can really take hold. In huge gene pools like modern cities, mutations are quickly muted by the dominance of the older DNA and evolutionary change becomes nearly impossible. It's not the main point of the story, but it's a good point."

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