So weird how these deep and unchanging genetic differences between NW Europeans and everybody else who ever existed on the planet only showed up about 400 years ago.https://twitter.com/Outsideness/status/979579858853359616 …
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We don't have to guess. Even if there are significant genetic differences between population groups, it still doesn't answer the question of why, if those differences are so earth-shattering, they showed up so late in the game.
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Why did Rottweilers "show up so late in the game"? Breeding programs take time. Gregory Clark explains the process: https://en.wikipedia.org/wiki/A_Farewell_to_Alms …
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... In the interim, I'm predicting much robust pattern.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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