Science usually steers firmly away from questions about the inner lives of animals. Surely they have inner lives of some sort. But like a child who is admonished that what he really wants to ask is impolite, a young scientist is taught that the animal mind — if there is such a thing — is unknowable. Permissible questions are "it" questions: about where it lives, what it eats, what it does when danger threatens, how it breeds. But always forbidden is the one question that might open the door: Who?