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Immanuel Velikovsky () (17 November 1979) was a Russian-born American independent scholar of Jewish origins, best known as the author of a number of controversial books reinterpreting the events of ancient history, in particular the US bestseller Worlds in Collision, published in 1950. Earlier, he played a role in the founding of the Hebrew University of Jerusalem in Israel, and was a respected psychiatrist and psychoanalyst.
His books use comparative mythology and ancient literary sources (including the Bible) to argue that Earth has suffered catastrophic close-contacts with other plane...