Sapiens ( A brief history of Humankind ) Summary Part 2
Multiple human species rooms the earth together the depiction of man evolving from a hunched over to upright incorrectly displays have human evolution as a linear trajectory, in fact, the species lived simultaneously humans have huge brains for their body size human brains account for two to three percent of the body size but use 25 percent of energy human con was very much in the middle of the food chain until 400,000 years ago and didn't leap to the top of the food chain until hundred thousand years ago most animals at the top of the food chain made it there gradually over millions of years humans, however, jumped up to the top relatively rapidly this means that the...