Cooking - A New Way to Make Food Safer

We spend less than an hour a day chewing, compared to six hours or more a day if we were an ape of our body size. That's how big an effect cooking has in softening the food and just making it easier to chew. Richard thinks fire gave us food security. Less time chewing meant more time to hunt and forage. And as we grew confident that we could always find something to cook and safely eat, we took the risk of going out on longer expeditions into the savannah to hunt for bigger game.