in far north genetic mutation to lose melanin in skin ensured better survival among aboriginal immigrants to far north -- they could absorb vitamin D easier which kept their bones strong. The farther north they went, the paler they needed to be to metabolically survive the long dark winters.
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in far north genetic mutation to lose melanin in skin ensured better survival among aboriginal immigrants to far north -- they could absorb vitamin D easier which kept their bones strong. The farther north they went, the paler they needed to be to metabolically survive the long dark winters.