National Geographic : 2002 Nov
MAPCHEAlDUBY ELUH0t CHAPLIN,CALII-ONIA ACADEMYUHSCIENCES Australian Aborigine Glenys Martin holds a map that charts predicted human skin colors based on global ultraviolet radiation intensity and precipitation levels. Within the limits of individual genetic makeup, more radiation results in greater amounts of skin-darkening melanin produced by the skin for protection. Yet with the effects of human migrations and cultural habits, people in one place can show tremendous variation in skin tone-like students from the Washington International Primary School. Equally diverse are biases that have evolved relative to skin color. But, as anthropologist Nina Jablonski says hopefully, "We're living in a time when people are ready to stop basing value judgments on skin color."