Anthropology- Hominids 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 …showed first 75 words of 486 total…

…showed last 75 words of 486 total…me more developed because of the planning that was involved, which required more brain activity than simply relying on instinct. The arboreal primates had to learn to adapt to their new environment. As our textbook brought out, life in the trees was different than that on the ground. The arboreal primates had to react to new situations, and act on things they observed in the environment. All of this stimulated the brain and encouraged growth.