Discussing the book "Shadows of Forgotten Ancestors: A Search for Who We Are" about the evolution and the future of the human species. Includes an excerpt of the astronomer Harlow Shapley speaking at the beginning. Includes Carl Sagan reading an excerpt from the book at the end.

A sprawling conversation with R. Buckminster Fuller including his great aunt Margaret Fuller, future communication, the nature of work, human nature, and physics.

Aileen and Eugene Smith discuss their photographic essay book, "'Minamata', Words and Photographs," documenting the mercury poisoning of residents and their legal battles with the polluting company Chisso.

Terkel interviews activist and children's author Dagmar Wilson. She discusses how she goes from a children's author to an activist for anti-nuclear testing.