Man... Food... Fire... A presentation by Steven Raichlen at Harvard.  It will come as no surprise to anyone that has a copy of Planet Barbecue that Steven has completed a massive amount of research on this subject.  I found it very fascinating not as much from a cooking perspective, but from an evolution perspective.  He talks of great jaw muscles that were required for chewing all day prior to the ability to make fire and cook.  He also discusses the "sacrifices" by earlier civilizations where a beast was burned... barbecue anyone?  I truly enjoyed this intellectual look at barbecue and our evolution and hope that you will find it the same.