"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earthâ€”all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."

Source : "De Forest Says Space Travel Is Impossible". "Lewiston Morning Tribune" Newspaper, February 25, 1957.

Lee De Forest

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