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Famous Scientists.

52 PROFILES

52 of history's most influential scientists. Nobel laureates, groundbreaking researchers, and discoverers who advanced human knowledge.

Carl Sagan

Editor’s spotlight — updated daily

Carl Sagan

United States

Carl Sagan's 1980 PBS series Cosmos reached over 500 million viewers in 60 countries. As an astronomer and astrophysicist, he contributed to NASA's Mariner, Viking, Voyager, and Galileo missions. He won the Pulitzer Prize for General Nonfiction and the NASA Distinguished Public Service Medal. Sagan co-founded the Planetary Society and wrote the bestselling book Cosmos.

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1730 1970