Why are we white?

[shkrobius]

The common answer is that up North there is no selective pressure to keep sun-blocking melanin in the skin whereas the pale skin enhances photogeneration of vitamin D. Whitening of European skin is very recent, just 6-12 kya; http://www.sciencemag.org/cgi/content ( Read more... )

Comments

[i_eron]

I enjoy reading your journal for a couple of months now, thank you for the many interesting posts

[shkrobius]

You are welcome

[i_eron]

Thank you for the paper pointers. I came across something by Cavalli-Sforza in the past, but "niasilil", these are much more interesting

[shkrobius]

Sparse population only makes the decimation of this population more complete. I meant genocide and ethnic cleansing technically, as the gene pool of the natives has dispappeared; whether it involved atrocity, who knows. I am inclined to think it was >> 60%, on several counts. First, the newcomers brought with them disease they acquired from domesticated animals. Second, unless there is total subjugation or replacement, the conquerors acquire the language of the conquered (there are exceptions, with the Nordic conquest of England, but even that is in doubt, I've written about it before: Why do we speak English?). The fact is that Indo-Aryan languages completely replaced the native ones. Another reason is that the gene is recessive. The pigmentation is controlled by many genes, but what makes European unique in its pinky lightness seems to be one gene, see below. Furthermore, as you correctly pointed out, there are recent precedents of population replacement during Columbian exchange. It makes sense that something much like this

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