Carl Sagan - First Sceptic, Then Astronomer

Carl Sagan - First Sceptic, Then Astronomer
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Details of Carl Sagan - First Sceptic, Then Astronomer

About Carl Sagan - First Sceptic, Then Astronomer
Carl Sagan - First Sceptic, Then Astronomer- Tribute written by Horst Sommer. Discusses Sagan's achievements, and his role as a "speaker for Earth".
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