Season 1, Episode 5 - "Evolution"
Ten milestones that have helped to tell life's story: -Walter Alvarez's asteroid theory of dinosaur extinction -The first identification of dinosaur fossils Stanley Miller's simulation of the early atmosphere, leading to organic compound formation -Robert Ballard's discovery of hydrothermal vent ecosystems -Charles Walcott's analysis of the Burgess Shale -The Linnaean classification system -Darwin's theory of natural selection -Donald Johanson's "Lucy" -Mary Leakey's Laetoli footprints -And Michel Brunet's Toumai skull
