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  2. Joule - Wikipedia

    en.wikipedia.org/wiki/Joule

    This is the definition declared in the modern International System of Units in 1960. [13] The definition of the joule as J = kg⋅m 2 ⋅s −2 has remained unchanged since 1946, but the joule as a derived unit has inherited changes in the definitions of the second (in 1960 and 1967), the metre (in 1983) and the kilogram . [14]

  3. Science fiction - Wikipedia

    en.wikipedia.org/wiki/Science_fiction

    Science fiction (sometimes shortened to sci-fi or abbreviated SF) is a genre of speculative fiction which typically deals with imaginative and futuristic concepts such as advanced science and technology, space exploration, time travel, parallel universes, and extraterrestrial life.

  4. Urdu literature - Wikipedia

    en.wikipedia.org/wiki/Urdu_literature

    Urdu literature (Urdu: ادبیاتِ اُردُو, “Adbiyāt-i Urdū”) comprises the literary works, written in the Urdu language. While it tends to be dominated by poetry , especially the verse forms of the ghazal ( غزل ) and nazm ( نظم ), it has expanded into other styles of writing, including that of the short story, or afsana ...

  5. Definitions of science fiction - Wikipedia

    en.wikipedia.org/wiki/Definitions_of_science_fiction

    "A science fiction story is a story built around human beings, with a human problem, and a human solution, which would not have happened at all without its scientific content." [13] Basil Davenport. 1955. "Science fiction is fiction based upon some imagined development of science, or upon the extrapolation of a tendency in society." [14] Edmund ...

  6. Outline of science fiction - Wikipedia

    en.wikipedia.org/wiki/Outline_of_science_fiction

    Science fiction genre – while science fiction is a genre of fiction, a science fiction genre is a subgenre within science fiction. Science fiction may be divided along any number of overlapping axes. Gary K. Wolfe's Critical Terms for Science Fiction and Fantasy identifies over 30 subdivisions of science fiction, not including science fantasy ...

  7. History of science fiction - Wikipedia

    en.wikipedia.org/wiki/History_of_science_fiction

    Several stories within the One Thousand and One Nights (Arabian Nights, 8th–10th centuries CE) also feature science fiction elements.One example is "The Adventures of Bulukiya", where the protagonist Bulukiya's quest for the herb of immortality leads him to explore the seas, journey to the Garden of Eden and to Jahannam (Islamic hell), and travel across the cosmos to different worlds much ...

  8. Subterranean fiction - Wikipedia

    en.wikipedia.org/wiki/Subterranean_fiction

    Subterranean fiction is a subgenre of speculative fiction, science fiction, or fantasy which focuses on fictional underground settings, sometimes at the center of the Earth or otherwise deep below the surface. The genre is based on, and has in turn influenced, the Hollow Earth theory.

  9. Speculative poetry - Wikipedia

    en.wikipedia.org/wiki/Speculative_poetry

    Science fiction poetry's main sources are the sciences and the literary movement of science fiction prose. [9]Scientifically informed verse, sometimes termed poetry of science, is a branch that has either scientists and their work or scientific phenomena as its primary focus; it may also use scientific jargon as metaphor. [10]