Science fiction (often shortened to Sci-Fi or SF) is a genre of speculative fiction, typically dealing with imaginative concepts such as advanced science and technology, spaceflight, time travel and extraterrestrial life. Science fiction often explores the potential consequences of scientific and other innovations, and has been called a "literature of ideas".
Letter to the Programming Committee, 59th World Science Fiction Convention
Biographical essay, including multiple quotes from fellow authors and significant excerpts from Heinlein's novels and stories
The introductory paragraph uses material from the Wikipedia article "Science fiction" as of 30 Nov 2018, which is released under the Creative Commons Attribution-Share-Alike License 3.0.