Por Que os Humanos Antigos Perderam os Pelos | e o Que Isso Tem a Ver Com Você Hoje

Why Ancient Humans Lost Their Hair | and What That Has to Do With You Today Among five thousand five hundred species of mammals, humans are the most hairless. And that was a very high-risk evolutionary gamble that completely changed what our species was capable of. The story of why we lost our hair is one of the most elegant in all of evolutionary biology, and it ends in a place you wouldn't expect. • Genetic evidence dating hair loss to 1.2 million years ago using the evolution of human lice • Why the African midday savanna was a hunting window that only hairless hominids could use • The endurance hunt of the San of the Kalahari: following an animal for thirty kilometers until it overheats and stops • Why humans have the highest density of eccrine sweat glands of any terrestrial mammal and what that means • The direct relationship between sun exposure, melanin, and skin color as a non-hierarchical evolutionary map • Why clothing has existed for at least one hundred to one hundred and seventy thousand years and how the genetics of body lice proves it • The CT fibers of bare skin that activate social bonding through affectionate touch in ways impossible on hairy skin • The hypothesis that touching bare skin may have co-evolved with language as a substitute for primate grooming • Why the hug you feel with a significant person is connected to a decision Evolution of a hominid from a million years ago • The human skin microbiome and what bare skin in contact with the world can mean for the immune system ═══════════════════════════════════════════════ SOURCES AND REFERENCES ═══════════════════════ ════════════════════════ Pagel, M. and Bodmer, W. — A naked ape would have fewer parasites — Proceedings of the Royal Society B Bramble, D.M. and Lieberman, D.E. — Endurance running and the evolution of Homo — Nature Carrier, D.R. — The energetic paradox of human running and hominid evolution — Current Anthropology Jablonski, N.G. — Skin: A Natural History — University of California Press Jablonski, N.G. and Chaplin, G. — The evolution of human skin coloration — Journal of Human Evolution Reed, D. L. et al. — Pair of lice lost or parasites regained: the evolutionary history of anthropoid primate lice — BMC Biology Dunbar, R.I.M. — Grooming, Gossip, and the Evolution of Language — Harvard University Press Löken, L.S. et al. — Coding of pleasant touch by unmyelinated afferents in humans — Nature Neuroscience Wheeler, P.E. — The thermoregulatory advantages of hominid bipedalism in open equatorial environments — Journal of Human Evolution Lieberman, D.E. — The Story of the Human Body: Evolution, Health, and Disease — Pantheon Coqueugniot, H. et al. — Earliest brain growth in fossil hominins and implications for brain evolution — Evolutionary Biology