Along with man's ability to use tools and language, cooking has long been accepted as a defining skill that separates mankind from the animal kingdom. This week we explore the Congo, where chimps prefer cooked to raw food, understand the cooking process, and are willing to wait to eat a cooked meal. We'll taste low sodium chicken broth, and we'll speak with food writer Adam Gopnik about food from the past. Then we'll head into the test kitchen to uncover the secrets to making spicy Peri Peri Chicken. And of course, we'll be taking your calls to answer all of your cooking questions.