Michio Kaku with Dr. Greg Stock, on Redesigning Humans and genetic engineering.
Dr. William Calvin on the secrets of the human mind and Dr. Jay Olshansky on the quest for immortality.
Dr. Richard Gott: Is time travel possible?
Discussion with guest Lester Brown.
Daniel Dennet - origin of religion using evolution
Dr. Robert Lanza on the future of medicine, and Lester Brown on the state of the earth.
Drs. Carl Zimmer and Robert Hagen discuss evolution of life on earth and in outer space
Dr. Charles Seife - can fusion solve the energy crisis?
The life, religion, and politics of Albert Einstein. With guests, Fred Jerome and John Brinster.