Why Did Ancient Humans Have Different Skin Colors?

Why did ancient humans have different skin colors — and why did the first Englishman turn out to have dark skin and blue eyes? The oldest complete skeleton ever found in Britain (Cheddar Man) had near-black skin. For 300,000 years every human was dark-skinned, and pale skin is a recent, local adaptation — not an upgrade. This is how one species ended up with the whole palette. In this video: • ONE COLOR — why the first Homo sapiens were all dark-skinned, and how melanin protected against skin cancer AND folate loss in pregnancy (Jebel Irhoud, Morocco, ~315,000 years) • THE MOVE NORTH — how leaving Africa flipped the problem from too much UV to too little, and why vitamin D drove lighter skin • Cheddar Man & La Braña — dark skin + blue eyes was NORMAL in Europe for millennia (La Braña, Spain, 7,000 years; Nature, 2014) • How farmers repainted Europe: the SLC24A5 & SLC45A2 genes, and how a change in diet may have sped it up • Convergent evolution in Asia (MFSD12) and the Inuit exception that breaks the "latitude = skin color" rule • Why "race" doesn't show up in your DNA — skin color is 100+ genes, and the most diversity on Earth is inside Africa (Sarah Tishkoff, 2017, Science) Sources: Brace, S. et al., 2019 (Nature Ecology & Evolution) & Natural History Museum, 2018. Cheddar Man genome — dark skin, blue eyes. Olalde, I. et al., 2014 (Nature). "Derived immune and ancestral pigmentation alleles in a 7,000-year-old Mesolithic European" (La Braña). Hublin, J-J. et al., 2017 (Nature). "New fossils from Jebel Irhoud, Morocco..." (~315,000-year-old Homo sapiens). Crawford, N. G. / Tishkoff, S. et al., 2017 (Science). "Loci associated with skin pigmentation identified in African populations." Jablonski, N. G. & Chaplin, G., 2000/2010 (J. Human Evolution / PNAS). UV, folate, vitamin D and the evolution of human skin color. 🔔 Subscribe for more on how the human story actually worked — this is Sketchient. #ancienthumans #humanevolution #skincolor #cheddarman #historyexplained