Just how far do the similarities between humans and great apes extend? Sequences from historic experiments by Allen and Beatrix Gardner, Sue Savage-Rumbaugh, and other primatologists, plus footage shot in the wild, provide compelling support for the thesis that chimps, bonobos, gorillas, and orangutans are highly evolved indeed. Demonstrations of cognition, self-awareness, memory retention, language use, social behavior, mating practices, and perhaps even a sense of good and evil reveal species remarkably kindred to Homo sapiens. The anatomical basis for apes’ inability to articulate speech, despite having Broca’s area, is also discussed. (41 minutes)