Read the paper: Inference of ecological and social drivers of human brain-size evolution Proposals for how large brains evolved in humans include … Toward the end of this time period, the human ancestors began figuring out how to make very primitive tools. One of the prominent ways of tracking the evolution of the human brain is through direct evidence in the form of fossils. This crucial step was necessary for brain evolution since the modern human brain requires a constant source of … The evolutionary history of the human brain shows primarily a gradually bigger brain relative to body size during the evolutionary path from early primates to hominids and finally to Homo sapiens. Human evolution - Human evolution - Increasing brain size: Because more complete fossil heads than hands are available, it is easier to model increased brain size in parallel with the rich record of artifacts from the Paleolithic Period (c. 3.3 million to 10,000 years ago), popularly known as the Old Stone Age. Humans are known for sporting big brains. This allowed them to begin hunting larger animals and increase their protein intake. On average, the size of primates' brains is nearly double what is expected for mammals of the same body size. Because fossilized brain tissue is rare, a more reliable approach is to observe anatomical characteristics of the skull that offer insight into brain characteristics. The Paleolithic preceded the Middle Stone Age, or Mesolithic Period; this nomenclature sometimes causes …
Our data show that, 300,000 years ago, brain size in early H. sapiens already fell within the range of present-day humans.
One such method is to observe th… The smaller size of the brain at this stage in human evolution was adequate for survival.
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