. . . . "Summary: The edge of forever: Dr. Sagan leads viewers to a time when galaxies were beginning to form, to India to explore the infinite cycles of Hindu cosmology, and to show how humans of this century discovered the expanding universe and its origin in the big bang. The persistence of memor: The brain is the focus of this fascinating portion of our journey as Dr. Sagan examines another of the intelligent creatures with whom we share the planet Earth." . . "Cosmos. [Volume 6], The edge of forever ; The persistence of memory" . "Persistence of memory" . . . . . "Edge of forever" . . . . . . . . . .