Science fiction

Science fiction (often shortened to sci-fi or abbreviated SF) is a genre of speculative fiction that stereotypically deals with imaginative and futuristic concepts: these concepts include advanced science and technology, space exploration, time travel, parallel universes, and extraterrestrial life. The genre can explore science and technology in different ways, such as human responses to or the consequences of theoretical new advancements.

Science fiction is related to fantasy (together abbreviated SF&F), horror, and superhero fiction, and it contains many subgenres. The genre's exact definition has long been disputed among authors, critics, scholars, and readers. Major subgenres include hard science fiction, which emphasizes scientific accuracy, and soft science fiction, which focuses on social sciences. Other notable subgenres are cyberpunk, which explores the interface between technology and society, and climate fiction, which addresses environmental issues.

Precedents for science fiction are claimed to exist as far back as antiquity, but the modern genre arose primarily in the 19th and early 20th centuries, when popular writers began looking to technological progress for inspiration and speculation. Mary Shelley's Frankenstein, written in 1818, is often credited as the first true science fiction novel. Jules Verne and H.G. Wells are pivotal figures in the genre's development. In the 20th century, the genre grew during the Golden Age of Science Fiction; it expanded with the introduction of space operas, dystopian literature, and pulp magazines.

Science fiction has come to influence not only literature, but also film, television, and culture at large. Science fiction can criticize present-day society and explore alternatives, as well as provide entertainment and inspire a "sense of wonder".