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    17. avatar

    Carl Sagan

    c/carl-sagan

    Carl Edward Sagan was an American astronomer, planetary scientist and science communicator.

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    All mentions

    Aldrin

    1 mention across 1 talk in Carl Sagan

    More from Aldrin
    Why We Should Go to Mars1 mention
    7:55

    …we are today to such a mission, I believe, is no greater than the technical step from president Kennedy's 1961 speech to the Armstrong Aldrin landing in 1969. No one is proposing that it be done in the short period of eight years. I think we should do…