What is animal intelligence? In what ways is it similar to human intelligence? Many behavioral scientists have realized that animals can be rational, can think in abstract symbols, can understand and react to human speech, and can learn through observation as well as conditioning many of the more complicated skills of life. Now Duane Rumbaugh and David Washburn probe the mysteries of the animal mind even further, identifying an advanced level of animal behavior--emergents--that reflects animals' natural and active inclination to make sense of the world. Rumbaugh and Washburn unify all...