Comments by "Mentat" (@_Mentat) on "Is mass immigration from Africa to Europe a disaster, or might there be an advantage in the future?" video.

  1. Darwin covered hybridisation in chapter 8 of Origin of Species. He is clear that any benefit is only to the first generation. Subsequent generations go downhill. Ask a farmer if you can mix two pedigree herds and get a third pedigree herd. The answer is no. When they make this sort of cross in cows the results are eaten! They are not used for breeding.
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  2. Neanderthals are not strictly-speaking entirely extinct, since Europeans have 2-3% Neanderthal DNA. Because not all Europeans have the same 2-3% about 20% of the overall Neanderthal genome is preserved. However, this 'alien' DNA is associated with various diseases and not good for the carriers; not least because it has given us gingers!
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