Kwyj1b0 (2757125) writes "In a massive study on genetic variation among humans, researchers found that most changes occurred in the last 200 generations, too fast for natural selection to catch up. Recent papers show that rare genetic variations have a more drastic effect than previously believed. Another result shows that "we carry a much larger load of deleterious variants" (as well as positive variants) than our ancestors 200 generations ago." Link to Original Source
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