. . . . "Closed caption video recordings"@en . . "Alan Alda takes a look at how humans first appeared on Earth millions of years ago, and how our species not only survived, but thrived, through some unimaginable conditions. Alda visits with dozens of scientists on three continents, and participates directly in many experiments - including the detailed examination of his own brain."@en . . . . . . . . . "The human spark"@en . . . "Television programs"@en . "Video recordings for the hearing impaired"@en . . . . . . . . . . "Nonfiction television programs"@en . "Documentary television programs"@en . . . . "Biological Evolution." . . "Hominidae." . . "Brain physiology." . .