In the studies that have been done on primate and early human evolution, there is strong evidence that eating meat played a large role in increased brain size. Early plant eating hominids had a cranial capacity of about 300 cc to 500.cc. The earliest known meat eating hominids had a capacity of about 600 cc to 750 cc. Why the difference?
Hominids require amino acids in their diets to remain healthy. It is difficult to find them in vegetation that is easily digestable. Thus, the hominids had to come up with a solution. The solution was to add meat to their diet. The early hominids were small creatures without tools for hunting animals. How were they going to get the meat they needed?
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