Walking with Beasts2001

Kenneth Branagh:
Meat is only a small part of the Australopithecus diet, but it will become more important in the future, for more human-like apes. An increase in meat eating will go hand in hand with an increase in brain size. Meat contains nutrients vital for big brains. Intelligent apes will develop special tools to get meat, until eventually they'll make weapons, and won't be scavengers, but predators.