Human Body

Though gorillas typically spend up to eight hours feeding, supporting big bodies and big brains would be almost impossible on a raw food diet. Photo: AFP

Cooking gave humans larger brains than primates, researchers say

If human beings had not invented cooking as a way of increasing the number of calories they consumed, they could only have evolved the 86 billion neurons in our big brains by spending an impossible nine hours or more each day eating raw food, according to a scientific paper.