This is based on animal studies, which showed how mice with large-brain primate microbes eat more, but grow slower and put on less body fat. Furthermore, these mice use the excess energy to ...

He elucidates evolutionary forces that led to brain specializations as well. For example, fruit-eating primates have distinctly different brain structures and larger relative brain sizes than leaf ...

Gut microbes play a key role in breaking down the food that we eat and thus releasing ... study is that it included only three primate donors with varying brain sizes," Suzuki said.