| | Science Fiction Work @ LaunchBase.net (Launch Base) (Site not responding. Last check: 2007-10-12) |
 | | A science fiction story may be firmly rooted in real scientific possibilities (see Hard science fiction) as they are understood at the time of writing, as in 's novel A Fall of Moondust, or highly imaginative, set in an extraterrestrial civilization or a parallel universe, as in Isaac Asimov's novel The Gods Themselves. |
 | | The broader category of speculative fiction (first suggested by Robert A. Heinlein) includes science fiction, fantasy, alternate histories (which often have no particular scientific or futuristic component), and even literary stories in which the only fantastic element is the strangeness of their style. |
 | | Science fiction television dates from at least as early as 1938, when the BBC staged a live performance of the science fiction play R.U.R. The first regularly scheduled SF series to achieve a degree of popularity was Captain Video and his Video Rangers, which ran from 1949 to 1955 on the American DuMont Network. |
| www.launchbase.net /encyclopedia/Science_fiction (2750 words) |