Origins of Us

Dr. Alice Roberts begins her examination of human evolution with the source of all physical power, the skeleton. She charts the advantages that standing upright brought people and uncovers insight into how people live today.

Dr. Alice Roberts explores the connection between stomach size and the large human brain. Scientists believe that women cooking vegetables -- not men hunting meat -- enabled a major leap in human evolution.

Dr. Alice Roberts explores the evolution of the human brain and asks whether the powerful organ, which is three times larger than expected, is the key to understanding human domination of the planet.