According to Brazilian scientists Karina Acevedo-Fonseca and Suzanne, Herculano-Heusel, the increase of the human brain in the course of evolution became possible due to the fact that he learned how to process the products used them for food.
Conducting a laboratory experiment on primates, they made counting the number of neurons in their brain and found that evolution has occurred because of food began to produce more energy. As you know, ready food is digested by the body with less energy than raw. Once people have mastered the ability to handle raw foods, they have more opportunities for other activities, and brain volume started to increase.
According to the study, there is a correlation between the size of the brain of primates and the number of neurons, which is greater, the greater the amount of calories entering the body and for the brain.