But now scientists say it’s not entirely true. A group of scientists conducted a study aimed at trying to figure out than our ancestors, who were probably covered with a thick woolen cover, to sacrifice in order to move in a hot environment the African savannah.
Body size used in the model – 30 kg for females and 55 kg for males, were taken from the example of our early ancestors Australopithecus afarensis (species whose remains found in Ethiopia). The model showed that the 30-minute walk from the cover of this would have caused a high risk of heat stroke if they were on the four endings, or upright on two.
It is this question in a new article in the Proceedings of the National Academy of Sciences. Previously, scientists have supported the view that there is a relationship between bipedal locomotion and the struggle with the heat, but new research proves that this is not the case.