Gene flow?

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Gene flow? Between homo erectus and homo sapiens and neanderthals. Did
it ever occur to you that they all may have been seperate species. I
mean how much gene flow do we have between lions and tigers, or
between chimps and gorillas? None , because they cannot have fertile
offspring!

I think that if we apply standard criteria for differentiating between
species among primates in general to hominids it could clear up things
significantly. Take all extant species of baboons and see how they
differ. And then take a look at a neanderthal cranium beside a cro
magnon. What would you say?

Ludvig

PS. Hey what about gene flow between elephants and coccaburras?

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