"Carl Sagan always used to say that when he was trying to explain something to someone, he would go back to that time when he didn't understand it, and then he would retrace his thought steps so that he could make it absolutely clear, and that's one of the infinite number of things I learned from him."

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Source : "Neil deGrasse Tyson and Executive Producer Ann Druyan Talk COSMOS: A SPACETIME ODYSSEY, Public Appetite for Science, and More". Interview with Christina Radish, collider.com. March 17, 2014.

Ann Druyan

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