Carl Sagan

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Carl Edward Sagan (November 9, 1934 - December 20, 1996) was an American astronomer and science popularizer. He pioneered exobiology and promoted the Search for Extraterrestrial Intelligence (SETI). He is world-famous for his popular science books and the television series Cosmos, which he co-wrote and presented. In his works he frequently advocated the scientific method.

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