Vitamin D, sunlight, and natural selection.
D005075:Biological Evolution; D006801:Humans; D008543:Melanins / Q000378:metabolism; D010858:Pigmentation; D011830:Radiation Effects; D012867:Skin / Q000528:radiation effects; D013472:Sunlight; D014807:Vitamin D / Q000096:biosynthesis*
D008543:Melanins; D014807:Vitamin D