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	Carl Sagan on natural laws/constellations (XXXSDESDEXXX) View
	Carl Sagan Videos: Natural Laws of Constellations (CarlSaganVideos) View
	Carl Sagan on the Existence of God (Orson Hyde) View
	Carl Sagan explains how he came to know what the stars are (XXXSDESDEXXX) View
	Carl Sagan on Tycho Brahe, Johannes Kepler, and ellipses (XXXSDESDEXXX) View
	Carl Sagan explains the evolutionary processes of life (XXXSDESDEXXX) View
	Carl Sagan talks about the Greeks' contributions to science (XXXSDESDEXXX) View
	Carl Sagan on Epicycles, Ptolemy, and Kepler (XXXSDESDEXXX) View
	Carl Sagan - The last scientific astrologer and the first astronomer, Johannes Keppler (Red Panda) View
	Carl Sagan - Birth of Science Clip (Marc Belley) View