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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AC TV: Best Science Fiction Shows of the 2000 Decade: The 2000s were a great decade f.. http://bit.ly/8WtnBA #AC #television #tv
AC_Television (AC Television) Wed, 16 Dec 2009 20:54:36 -0000
AC TV: Best Science Fiction Shows of the 2000 Decade: The 2000s were a great decade f.. http://bit.ly/8WtnBA #AC #television #tv
@asimkovsky You are. Really, science wise, that's just goofy. And as Star Trek is science -fiction-, same goes for evolution.
ArrogantTomboy (Remi Trast) Wed, 16 Dec 2009 20:52:49 -0000
@asimkovsky You are. Really, science wise, that's just goofy. And as Star Trek is science -fiction-, same goes for evolution.
RT @torbooks: 20 Best Science Fiction Books Of The Decade [Decade In Review] http://bit.ly/4EznWX
BookLover73 (Raisa Gonzalez) Wed, 16 Dec 2009 20:51:33 -0000
RT @torbooks: 20 Best Science Fiction Books Of The Decade [Decade In Review] http://bit.ly/4EznWX
RT @torbooks: 20 Best Science Fiction Books Of The Decade [Decade In Review] http://bit.ly/4EznWX
editorialdept (Editorial Department) Wed, 16 Dec 2009 20:48:25 -0000
RT @torbooks: 20 Best Science Fiction Books Of The Decade [Decade In Review] http://bit.ly/4EznWX
20 Best Science Fiction Books Of The Decade [Decade In Review] http://bit.ly/4EznWX
torbooks (Tor Books (Jen Hill)) Wed, 16 Dec 2009 20:47:26 -0000
20 Best Science Fiction Books Of The Decade [Decade In Review] http://bit.ly/4EznWX
@JLichtenberg Absolutely. There are some excellent Science Fiction/Fantasy books here http://bit.ly/8sZMly
Luludotcom (Luludotcom) Wed, 16 Dec 2009 20:44:06 -0000
@JLichtenberg Absolutely. There are some excellent Science Fiction/Fantasy books here http://bit.ly/8sZMly

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