One comment on “Some Fallacies About Human Evolution

  1. Some notes of interest from this post–

    from original source: Journal of Medical Hypotheses. 74:1, Jan. 2010, pp. 195-201

    The greatest distance genetically is between African Blacks from Nigeria and Aborigines.

    There’s a reason why Blacks are so far away from all the rest of us. They’ve been evolving longer. They’ve been evolving in Africa for 185,000 years, though the Negroid type we are most familiar with has only been around for 12,000 years. Pygmies broke off about 70,000 YBP and Khoisan types before that.

    Aborigines are the furthest from Black because they have been separated from Blacks and evolving away from them the longest.

    The vast majority of evolutionary changes are just junk and don’t have that much fitness value. You can pile up tons of evolutionary change in your genome without necessarily improving your species much.

    Polynesians only show up ~3,000 YBP, and NE Asians show up ~50,000 YBP.

    The group that left Africa may have been very small, perhaps as small as 500-1,000 persons. From this small group evolved all of the Out Of Africa humans over 70,000 years. That all of us OOA folks came from this small select group is the reason why we are so close together – we all evolved from this small genetically similar group.

    One thing that confuses people is the appearance of Negritos, Papuans and Melanesians. Yeah, they look like Blacks, but they are some of the most distant from Blacks of any humans. Whites are far closer to Blacks than say Papuans are.

    Just because two groups look alike doesn’t mean they are all that close genetically. And just because two groups differ in appearance doesn’t mean that they are all far genetically.

    Papuans et al came out of Africa like all the rest of us, but they retained a lot of African features while evolving dramatically away from Africans in terms of their genome.

    Presumably the African features like kinky hair, dark skin and wide noses were as useful in the jungles in New Guinea as they were in Africa. Kinky hair is useful because it evaporates heat better and allows for greater sweating. Melanin is well known to be advantageous in areas of high UV. A wide nose is the human default. There’s nothing special about it, but a long thin nose is useless in the tropics, as all it’s going to do is make you hot

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