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	Stephen Hawking and Carl Sagan on the Greenhouse Effect (greenman3610) View
	Stephen Hawking, Carl Sagan and Earth Rainbow Warriors Messages To the BP Oil Spill (activistchat) View
	Carl Sagan testifying before Congress in 1985 on climate change (carlsagandotcom) View
	Carl Sagan - Stephen Hawking, The Beginning (Curtis Coatham) View
	(1-6) Carl Sagan, Stephen Hawking and Arthur C. Clarke - God, The Universe and Everything Else (nethius) View
	(3-6) Carl Sagan, Stephen Hawking and Arthur C. Clarke - God, The Universe and Everything Else (nethius) View
	(4-6) Carl Sagan, Stephen Hawking and Arthur C. Clarke - God, The Universe and Everything Else (nethius) View
	Carl Sagan on the Existence of God (Orson Hyde) View
	Carl Sagan - Insightful, motivational quotes about the universe and astronomy. (Quote) View
	Carl Sagan - A Way of Thinking \| From (astris) View