The brain of modern man uses 20 Watts about 400 calories per day, one fifth of total human energy consumption.

• The brain of modern man uses 20 Watts about 400 calories per day, one fifth of total human energy consumption.
• Currently, scientists estimate that humans branched off from their common ancestor with chimpanzees about 5-7 Million Years Ago.
• Recent research suggests that the some australopithecines were capable of a precision grip, like that of humans but unlike apes, which would have meant they were capable of making stone tools.