The great apes - ingenious, clever, perceptive - are the closest thing humans have to living relatives. These thoughtful and creative tool users continue to surprise researchers with their exhibitions of self-awareness and an apparent ability to reach into the minds of others. Explore the striking physical features, evolution, social structure, habitat, and communication skills of the great apes. Computer graphics, 3-D animation, and spectacular wildlife film footage give a detailed look at the lives of these endangered mammals. Scientists discuss the genealogy and evolution of the apes, as well as providing facts and stories about the unique qualities of these creatures who so closely resemble humans. Narrated by Will Lyman.