Cold injury and the evolution of "white" skin.
D000818:Animals; D044383:Black People; D002478:Cells, Cultured; D005627:Frostbite / Q000453:epidemiology*; D006168:Guinea Pigs; D006801:Humans; D066298:In Vitro Techniques; D008544:Melanocytes; D010858:Pigmentation; D051381:Rats; D012756:Sheep; D012880:Skin Pigmentation; D044465:White People