Home / Series / Cosmos / Aired Order / Season 1 / Episode 13
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Who Speaks for Earth?

Through the use of special effects we retrace the 15-billion-year journey from the big bang to the present. We also hear the tragic story of the martyrdom of Hypatia, the woman scientist of ancient Alexandria. This is the famous episode on nuclear war in which Dr. Sagan argues that our responsibility for survival is owed not just to ourselves, but also to the cosmos, ancient and vast, from which we spring.

Deutsch English français español Português - Brasil български език
  • Originally Aired December 21, 1980
  • Runtime 60 minutes
  • Network PBS
  • On Other Sites IMDB
  • Notes Is the series finale
  • Created November 21, 2019 by
    Administrator admin
  • Modified November 21, 2019 by
    Administrator admin
Name Type Role
Carl Sagan Writer
Ann Druyan Writer
Adrian Malone Director