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Carl Sagan da en.wikipedia.org
Carl Edward Sagan was an American astronomer, planetary scientist, and science communicator. His best known scientific contribution is his research on the ...
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We are a team of writers, filmmakers, producers, researchers, engineers, educators and artists who, with a growing list of partners across science, ...
Carl Sagan da www.britannica.com
7 giorni fa · Carl Sagan, American astronomer and science writer. A popular and influential figure in the United States, he was controversial in ...
Carl Sagan (1934 - 1996) played a leading role in the American space program from its very beginning. He was a consultant and adviser to NASA beginning in the ...