A look at how teeth are used for communication, such as a chimp’s grin, and how we might misinterpret what looks like a grin. We examine how different teeth are used for different chewing tasks, whether the teeth are canines, incisors, or molars, and how teeth differ in carnivores and omnivores. Finally, we look at how animals without teeth manage to consume their food, and how beaks work for both turtles and birds.