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Sagan started working as an advisor for NASA
He started working as an advisor -
Mariner 2 confired Sagan's views that venus was dry and very hot
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1st achieved national attention with his book "intelligent life in the universe"
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Wrote article on the potential of life on the planets for national geographics
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Sagan and Pollack solved mystery about the seasonal "wave or darkening" on mars
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Named director of Cornell's laboratory for planetary studies
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became associate director of the center for the radio physics and space research at cornell
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Arecibo message sent to space was helped by sagan to launch
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Sagan decided to test the capacity of television to bring science to a mass audience
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Sagan became a founding member of the committee for the scientific investigation of claims of the paranormal
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television series Cosmos: a personal voyage aired
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Sagan introduced the idea of "Nuclear Winter"
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Sagan participated in an extensive scientific study of the atmosphere consequences of nuclear war
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Sagan died of a rare bone marrow disease