PSW 2345 Human Skin Color | Nina Jablonski

April 10, 2015
Nina Jablonski, Evan Pugh Professor of Anthropology, Pennsylvania State University

Variation in human skin color has fascinated and perplexed people for centuries. As the most visible aspect of human variation, skin pigmentation has been used in the past as a basis for classifying people into races. Studies conducted in the past 25 years have shown that skin pigmentation is a biological adaptation that regulates the penetration of ultraviolet radiation (UVR) into the skin, and represents an evolutionary compromise between the conflicting demands of protection of the skin against UVR and of production of vitamin D by UVR.

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