Cosmos: Season 1, Episode 7: The Backbone of Night
Starring: Carl Sagan, Jaromír Hanzlík, Bob Hevelone, Bill Grant, Jonathan Fahn, Jean Charney, Alan Belod
Length: 60 minutes
On Air Date: 9 Nov 1980
Cosmos: S01E07 Description: Carl Sagan looks at the work of ancient Greek scientists and astronomers including Thales, Anaximander, Democritus, and Pythagoras.