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There's alot these days as I'm sure we're all aware of regarding Neanderthal admixture causing the theoretical hybrid known as Cro-Magnon.
So the question is, why would this theoretical hybridization have occurred between Neanderthal and the other Homo-Sapien arrivals to Europe who had a more gracile non-robust look to them?
In theories in accordance with Natural Selection (how favorable traits play a role in how we choose mates) Neanderthal is now being considered intelligent as to why this may have occurred. Re-examination of Upper Paleolithic Moustrian archaeological assembalges/artifacts in Europe has led to this revamped view of Neanderthal and that the species was actually smarter then the Out of Africa arrivals to Europe c. 45,000 BC. This of course challenges the notion that Neanderthal was dumb and incapable of adaption and ultimately bred and/or killed out as has been the traditional view.
However, what about Sexual Selection? Some Neanderthal specimens are suggested based on aDNA analysis to possess SNPs responsible for lighter hair, eye and skin color. Similarily, Anthropologist Peter Frost argues this is why lighter phenotypes begin to appear in Europe:
So what do you think? Do you find Neanderthal sexy?:Peter Frost is a Canadian anthropologist, he is best known for a hypothesis on the evolution of European hair, eye and skin color by sexual selection. He believes sexual dimorphism of complexion in humans acts as a cue for identifying a person's sex. Frost takes issue with the commonly accepted theory that the evolution of light eye and hair coloration is a side effect of natural selection for skin color, in order to maximize vitamin D synthesis in high latitudes. He contends that light skin preference acting with a imbalanced sex ratio and monogamous mating during the Late Glacial Maximum, resulted in novel hair and eye colors, and white skin, evolving by sexual selection.
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