A barbecue taps into our hunter-gatherer of past. But eating beef no longer requires a life-and-death battle for the formidable adversary. 8000 years ago, something extraordinary happened to change all that. hunter-gatherer:采猎者，靠打猎和采集...
This is the animal we see grazing in a field as we drive along the highway. They have a timeless quality as if they have always been with us and we have always known them. In short, we take the cow for granted. John Webster, Professor of Animal Husba...
