Why cooking temperature are so important?

Heat has been used in cooking since the early history of man. Bones found in prehistoric fire sites where cooking was done have been dated back some one and a half million years. It could be argued that cooking made man what he is. Cooking is all about heat, and man, the only animal that cooks his food, has mastered the nuances of fire in this application. In general, cooking makes a lot of food more digestible. The heat of cooking changes the protein in food, and the food then delivers a wider variety of complex proteins than a bunch of raw food does. Additionally, a lot of cooked food is more easily stored.