 Pet owners have sworn for years that their animal companions are thinking and feeling. This film examines the work of scientists investigating this point of view. In doing so, some very complex and flexible behaviors among a variety of animals are shown, from an African gray parrot that solves logic problems to a chimpanzee entertaining herself by making faces in a mirror. We may not be the only creatures to solve problems with mental pictures, fashion tools, make sounds to communicate, or be creative.