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Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among individuals is caused by variation in pigmentation, which is the result of genetics (inherited from one's biological parents ), exposure to the sun, disorders, or some combination thereof.
Jan 3, 2024 · Variations in human skin color are adaptive traits that correlate closely with geography and the sun’s ultraviolet (UV) radiation. As early humans moved into hot, open environments in search of food and water, one big challenge was keeping cool.
Oct 12, 2017 · But different groups of people in Africa have almost every skin color on the planet, from deepest black in the Dinka of South Sudan to beige in the San of South Africa. Now, researchers have discovered a handful of new gene variants responsible for this palette of tones.
Jan 28, 2019 · Human skin color reflects an evolutionary balancing act tens of thousands of years in the making. There’s a convincing explanation for why human skin tone varies as a global gradient, with the darkest populations around the equator and the lightest ones near the poles.
- Bridget Alex
After ten years of digging, the two had arrived at what amounts to the first comprehensive theory of human skin color. What Jablonski calls “this beautiful sepia rainbow” evolved as a response to human migration, local UV regimes, and the body’s need for vitamin D.
Jun 29, 2015 · This film explores the hypothesis that different tones of skin color in humans arose as adaptations to the intensity of ultraviolet radiation in different parts of the world. Our human ancestors in Africa likely had dark skin, which is produced by an abundance of the pigment eumelanin in skin cells. In the high ultraviolet (UV) environment of ...
In The Biology of Skin Color, Penn State University anthropologist Dr. Nina Jablonski walks us through the evidence that the different shades of human skin color are evolutionary adaptations to the varying intensity of ultraviolet (UV) radiation in different parts of the world.
