Lucy

Chimps. Bonobos. Humans. We're all great apes. We take a look at what happens when we all try to live together. Our main story is the haunting tale of a chimp named Lucy. When Lucy was only two days old she was adopted by a psychologist and his wife who wondered: if given the right environment, how human could Lucy become? This story and other tales of radical sharing between humans and the creatures on earth most like us.

Learn more about this episode, which originally aired April 11, 2010.

Image of Lucy courtesy of Science and Behavior Books, Inc.