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Of Mice and Japanese Men | Intercultural Twilight Zone
Habilines and australopithecines coexisted, and the went extinct about 2.0 mya. Robust australopiths survived to about 1.2 mya (, ), and habilines , so they overlapped the tenure of a species about which there is no doubt of its genus: , which first appeared about 2.0-1.8 mya, and the first fossils are dated to 1.8 mya. is the first human-line species whose members could pass for humans on a city street, if they dressed up and wore minor prosthetics on their heads and faces. had a protruding nose and was probably relatively hairless, the first of the human line to be that way. That was probably related to shedding heat in new, hot environments, as well as cooling its large brain (molecular data with head and body lice supports arguments that the human line became relatively hairless even before australopiths). There are great controversies about that overlap among those three distinct lines that might all have ancestral relationships. Oldowan culture was a multi-species one. There is plenty of speculation that the rise of and its successors caused the extinction of other hominids, driving them to extinction by competition, predation, warfare, or some combination of them. What is certain is that “competing” protohumans went extinct after coexisting with the human line for hundreds of thousands of years. The suspicion that evolving humans drove their cousins to extinction becomes more common as the timeline progresses toward today.
Free Steinbeck Of Mice and Men Essays and Papers
Scientists today think that above all else, the first stone tools began humanity’s Age of Meat. Meat is a nutrient-dense food and is highly prized among wild chimpanzees that use it as a , and male chimps have used it as payment for sex. The human brain is more than three times the size of a chimpanzee’s, but recent research suggests that the human brain’s size is , and great ape brains seem relatively small because their bodies became relatively large, possibly due to sexual selection that resulted from vying for mates. Humans developed relatively larger brains and relatively smaller and weaker bodies, which was ; something had to give. Protohumans began relying on brains more than brawn. The studies of brain size, encephalization, neocortex function, intelligence, and their relationships are in their infancy. The current . Larger brains were needed for navigating increasing social complexity, and not only the number of individuals in a society, but the sophistication of interactions. It is also argued that smarter brains allowed for greater social complexity, in another possible instance of mutually reinforcing positive feedbacks. Societies can perform tasks that individuals cannot. Those engage in wars and revolutions. They can procure a food source and secure the territory, which creates the energetic means for developing a society. Tool-making may have been a bonus of that enlarged brain needed for social navigation, and walking bipedally coincidentally provided new opportunities for hands. , and all proposed dynamics may have had their influences. , about 10 times the energy needs of equivalent muscle mass, and primates cannot consciously turn their brains off any more than they can turn their livers off. Few studies have been performed on the relationships between energy, brains, and sleep, but a recent one found that sleep seems to be .