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by ticulatedspline
2 days ago
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There's a number of species that seem to have remained unchanged for thousands or even millions of years. So yes, under the right conditions a species can basically stop evolving. Maybe some future thing would cause them to begin to evolve again but the doldrums of evolution are indefinite. I'm also not sure where the line between selective breeding and "evolution" , I wouldn't consider a Pomeranian an "evolution" of a wolf (though I guess it is a different species). Is any persistent genetic change "evolution"? As for humans in general we've effectively eliminated most sources of selection, survivability really isn't an issue anymore, and fecundity is largely random, pretty much anyone can have kids, or choose not to have kids. The strongest thing we're probably selecting for right now is Mormonism and even they aren't making a dent in evolution. |
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