How did social scientists know that Australopithecus Afarensis was hairy?
They don’t know when we became relatively hairless. There is a largely discredited theory that we became hairless to make heat loss more efficient. That is seriously flawed reasoning as lack of naked Arabs cooling off in the desert would demonstrate. There is another theory that has a gene that regulates skin color that is about 1.2 million years old if memory serves. Since the theory ignores the fact the face of most anthropoids is exposed to the sun, it makes that theory sketchy. They don’t even know if Neanderthals were completely covered with hair. It is all just a guess.
