Science fiction (often referred to as either Sci-Fi or SF) is a genre of fiction in which at least part of the narrative depends on the impact of science, either real or imagined, to generate settings or events which have not yet occurred in reality (and may never do so).
Robert A. Heinlein, a leading writer of science fiction, wrote "A handy short definition of almost all science fiction might read: realistic speculation about possible future events, based solidly on adequate knowledge of the real world, past and present, and on a thorough understanding of the nature and significance of the scientific method." Science Fiction: Its Nature, Faults and Virtues in The Science Fiction Novel: Imagination and Social Criticism, Advent: Publishers, 1959. (This is a collection of lectures by Heinlein, Cyril Kornbluth, Alfred Bester, and Robert Bloch given at the U of Chicago in 1957). He immediately adds that if you "strike out the word 'future' it can apply to all and not just almost all SF."
Science fiction author Theodore Sturgeon wrote "A good science fiction story is a story about human beings, with a human problem, and a human solution, that would not have happened at all without its science content." quoted in James Blish, More Issues at Hand: Critical Studies in Contemporary Science Fiction (Advent Publishers, 1970) ISBN 091168218X.
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Science Fiction :: World Building

Furaha - Information about basic facts and the fauna of Alpha Phoenicis IV by the Institute of Furahan Biology [Java required for some sections].
Local Group - An extensively thought-out future history, illustrative glossary, and brief notes on the Boolean race. Emphasizes exploration and political intrigue.
Lungfish Alpha - A science-surrealist world that doesn't so much blur the lines between genres as pave over them, Lungfish Alpha combines space opera, cyberpunk, and fantasy into a unique world.
Meta Description: [ LungfishAlpha: Original science fiction setting ]
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The Kalieda Resource - Several detailed maps, some cultural notes, and the invented Gevey and Ga languages.
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