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Why do humans have different skin colors? If we all belong to the same species, why did human skin evolve into so many different shades? In this cinematic science documentary, we explore the fascinating story of human evolution, revealing how sunlight, ultraviolet (UV) radiation, melanin, vitamin D, folate, migration, and natural selection shaped the incredible diversity of human skin pigmentation over hundreds of thousands of years. You’ll discover: - Why modern humans first evolved in Africa - How UV radiation influenced skin pigmentation - What melanin actually does inside your skin - Why vitamin D became essential in regions with less sunlight - How human migration changed skin color over thousands of generations - Why Arctic populations didn’t always evolve very light skin - Why skin color follows UV radiation more closely than temperature Human skin color is not a system for dividing people. It is one of evolution’s most remarkable adaptations, helping our ancestors balance protection from harmful ultraviolet radiation while allowing enough sunlight to produce vitamin D. If you enjoy documentaries about human origins, anthropology, biology, evolution, ancient history, archaeology, and science, subscribe for more cinematic explorations into the story of our species. Sources Human Origins & Skin Color Evolution Smithsonian National Museum of Natural History – Human Origins Program: Human Skin Color Variation Nina G. Jablonski & George Chaplin (2000). The Evolution of Human Skin Coloration. Journal of Human Evolution, 39(1), 57–106. Nina G. Jablonski (2004). The Evolution of Human Skin and Skin Color. Annual Review of Anthropology, 33, 585–623. Nina G. Jablonski & George Chaplin (2010). Human Skin Pigmentation as an Adaptation to UV Radiation. Proceedings of the National Academy of Sciences (PNAS), 107(Suppl 2), 8962–8968. Nina G. Jablonski (2012). Living Color: The Biological and Social Meaning of Skin Color. University of California Press. Genetics of Skin Pigmentation Sarah A. Tishkoff et al. (2017). The Genetic Architecture of Skin Pigmentation in African Populations. Science, 358(6365). A. L. Cunningham et al. (2021). Research on pigmentation genetics and human adaptation. Mark D. Shriver & Rick Kittles. Multiple publications on human pigmentation genetics. UV Radiation, Folate & Vitamin D Chaplin, G. & Jablonski, N. G. (2009). Vitamin D and the Evolution of Human Depigmentation. American Journal of Physical Anthropology, 139(4), 451–461. Jones, P., Lucock, M., Veysey, M., & Beckett, E. (2018). The Vitamin D–Folate Hypothesis as an Evolutionary Model for Skin Pigmentation. Nutrients, 10(5), 554. Lucas, R. M. et al. (2006). Solar Ultraviolet Radiation: Global Burden of Disease from Solar UV Radiation. World Health Organization. Holick, M. F. (2007). Vitamin D Deficiency. New England Journal of Medicine, 357, 266–281.

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