I just found this interview in NPR. It's called "Cooking sets up apart from apes".
Cooking? really? what about the following video setting us apart from apes?
Ha. More seriously, it is a very interesting interview. The main idea is that humans have a difficult time staying healthy by eating only raw foods. Richard Wrangham goes on to explain why it is easier to extract nutrients from food when it is cooked. Go listen to it, it is only 5 minutes long.