Biologist, natural historian, and author David Attenborough discusses his book and upcoming television series “Life on Earth.” The book, show, and this interview focus on discussing the evolution of life.

Discussing "The Difference of Man and the Difference it Makes" and the philosophical ideals of Mortimer J. Adler. Mr. Adler speaks of his idea that the difference between human and animal behavior is a radical difference in kind.

Interviewing Timothy Leary.

Studs interviews Dr. Timothy Leary about the three stages of the psychadelic experience: turning on, tuning in, and dropout. Leary discusses how his life changed from being a successful psychologist and professor at Harvard to renewing his life as a religious teacher. He shares how the drug LSD is used in the tribal communities who turn on and also explains the values of those who practice turning on. Leary also describes other methods used to turn on, which he considers a religious experience. Studs reads what Richard Goldstein said about Dr. Leary.

Discussing the book "Seeing Voices: A Journey Into the World of the Deaf" (published by University of California Press) with the author, neurologist Dr. Oliver Sacks. Includes passage from the book.

Joan Cook discusses her book "In Defense of Homo Sapiens" and talks about research done by other scientists working with Chimps and other primates. She explains her stance that not all humans lean towards violence and that nature, not nurture, and the environment creates aggression and violence. The conversation compares economics and Darwinism for a view of humanistic economics.

Dr. Alan Solem, a malacologist, and Dr. John Engle, a bryologist, from the Field Museum discuss a research trip they plan to take to Australia. The two doctors also discuss climate and ecology in the Americas and in Australia. Dr. Solem will be researching land snails and Dr. Engel moss and liverworts.