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Science fiction, abbreviation SF or sci-fi, a form of fiction that deals principally with the impact of actual or imagined science upon society or individuals. The term science fiction was popularized, if not invented, in the 1920s by one of the genre's principal advocates, the American publisher Hugo Gernsback.
Examples of science fiction movies are: The Day the Earth Stood Still (1951), When Worlds Collide (1951), War of the Worlds (1953), Deep Impact (1998), Armageddon (1998), The Day After Tomorrow (2004).
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