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  • The Complete Cosmos

Cosmos | Who Speaks for Earth? | PBS

Duration: 01:02:02 (Full Program)
Program: The Complete Cosmos #113
Broadcast Date: Dec. 21, 1980

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.

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Post Date: March 19, 2009