S.C.I.E.N.C.E - DAY🕵️ .......... *Why Are There Different Skin Colors?* To answer that question, we need to turn back the clock about 1.2 million years or so, when “humans” as we know them began losing their fur and walking erect. Since that point, humanoids have been susceptible to the endless process of natural selection, in which favorable genes promote traits that aid survival, and are thus passed along to successive generations. The most important adaptation that early humans developed? The ability to survive sunlight. In the heart of sub-Saharan Africa, where it is believed that all humans originally came from, the sun is incredibly intense. For early humans living near the Equator, they were getting pounded by sunlight and radiation all year long, and excessive UV radiation can be very harmful to the skin, resulting in cell mutation, increased risks of cancer, and destroy essential vitamins in the body. Conveniently enough, melanin functions as a shield against ultraviolet radiation, thus protecting the cells from the many dangers of excess exposure. Over thousands of generations, as our ancestors’ skin became more and more exposed to sunlight, humans adapted to have higher levels of melanin, particularly eumelanin, to block those harmful rays. Imagine this video… but in reverse. #melanin #dar#dark/a> #dark #black #african #darkskinmodel #malemodel #nigerianmodel #science #exposure #scientist #sciencemodel #sciencetechnology #medicallabtechnologist #nudemodel #glamourmodel #seminude #fashionmodel #menunderwear #rippedmen
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"Luckies" • • • • • #photography #canon #black
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