Human-Like Hobby (2:34); Orangutans: Social Creatures (3:15); Apes Make Tools (2:06); Chimps Crack Nuts (2:37); Significance of Grooming (2:48); Primate Predators and Prey (3:37); Olduvai Gorge, Tanzania (2:25); Upright Walking Theory (3:24); Speculation About Feeding Behavior (1:49); Ancient Hunting Technique (3:48); Hunting in the Desert (3:19); Taming Herd Animals (2:48); Agriculture and Animal Domestication (2:22); Rise of Culture (2:03); Collapse of Ancient American Civilization (2:47); Growing Human Population (2:54); Human Ingenuity and Growth (3:08); David Attenborough's Closing Thoughts (1:00); Credits: Food for Thought: David Attenborough's Life of Mammals (1:01);
