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" "When I say I’m an agnostic, I only mean that the evidence isn’t in. There isn’t compelling evidence that God exists — at least your kind of god — and there isn’t compelling evidence that he doesn’t.
Carl Edward Sagan (9 November 1934 – 20 December 1996) was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. Sagan assembled the first physical messages sent into space, the Pioneer plaque and the Voyager Golden Record, universal messages that could potentially be understood by any extraterrestrial intelligence that might find them. Sagan argued the hypothesis, accepted since, that the high surface temperatures of Venus can be attributed to, and calculated using, the greenhouse effect. He testified to the US Congress in 1985 that the greenhouse effect will change the earth's climate system.
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Cosmos is for many that first encounter with the universe that you thought was foreclosed to you because you couldn’t do the math, or you live in a place where there are no scientists to invite you in. Carl wanted everyone to come on this voyage; to experience the power of the scientific perspective and the wonders it reveals. His secret was to recapture the person he was before he understood the concept and then retrace his own thought steps toward comprehension. It worked. He inspired legions to study, teach, and do science.
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Imagine, a room, awash in gasoline. And there are two implacable enemies in that room. One of them has nine thousand matches. The other has seven thousand matches. Each of them is concerned about who's ahead, who's stronger. Well, that's the kind of situation we are actually in. The amount of weapons that are available to the United States and the Soviet Union are so bloated, so grossly in excess of what's needed to dissuade the other, that if it weren't so tragic, it would be laughable. What is necessary is to reduce the matches and to clean up the gasoline.