Context: Time travel is the concept of movement (such as by a human) between certain points in time, analogous to movement between different points in space, typically using a hypothetical device known as a time machine, in the form of a vehicle or of a portal connecting distant points in time. Time travel is a recognized concept in philosophy and fiction, but traveling to an arbitrary point in time has a very limited support in theoretical physics, and usually only in conjunction with quantum mechanics or wormholes, also known as Einstein-Rosen bridges. In a more narrow sense, one-way time travel into the future via time dilation is a well-understood phenomenon within the frameworks of special relativity and general relativity, but advancing a large amount of time is not feasible with current technology. The concept was touched upon in various earlier works of fiction, but was popularized by H. G. Wells' 1895 novel "The Time Machine", which moved the concept of time travel into the public imagination, and it remains a popular subject in science fiction., Science fiction (often shortened to SF, sci-fi or scifi) is a genre of speculative fiction, typically dealing with imaginative concepts such as futuristic science and technology, space travel, time travel, faster than light travel, parallel universes, and extraterrestrial life. Science fiction often explores the potential consequences of scientific and other innovations, and has been called a "literature of ideas." It usually avoids the supernatural, and unlike the related genre of fantasy, historically science fiction stories were intended to have a grounding in science-based fact or theory at the time the story was created, but this connection is now limited to hard science fiction., Horace Leonard "H. L." Gold (April 26, 1914  February 21, 1996) was an American science fiction writer and editor. Born in Canada, Gold moved to the United States at the age of two. He was most noted for bringing an innovative and fresh approach to science fiction while he was the editor of "Galaxy Science Fiction", and also wrote briefly for DC Comics., Hard science fiction is a category of science fiction characterized by an emphasis on scientific accuracy. The term was first used in print in 1957 by P. Schuyler Miller in a review of John W. Campbell, Jr.'s "Islands of Space" in "Astounding Science Fiction". The complementary term soft science fiction, formed by analogy to hard science fiction, first appeared in the late 1970s. The term is formed by analogy to the popular distinction between the "hard" (natural) and "soft" (social) sciences. Science fiction critic Gary Westfahl argues that neither term is part of a rigorous taxonomy; instead they are approximate ways of characterizing stories that reviewers and commentators have found useful., Technology ("science of craft", from Greek , "techne", "art, skill, cunning of hand"; and , "-logia") is the collection of techniques, skills, methods and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation. Technology can be the knowledge of techniques, processes, and the like, or it can be embedded in machines which can be operated without detailed knowledge of their workings., Innovation can be defined simply as a "new idea, device, or method". However, innovation is often also viewed as the application of better solutions that meet new requirements, unarticulated needs, or existing market needs. This is accomplished through more-effective products, processes, services, technologies, or business models that are readily available to markets, governments and society. The term "innovation" can be defined as something original and more effective and, as a consequence, new, that "breaks into" the market or society. It is related to, but not the same as, invention. Innovation is often manifested via the engineering process. The exnovation is the opposite of innovation., A science fiction magazine is a publication that offers primarily science fiction, either in a hard copy periodical format or on the Internet., Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe., Genre (or ; from French "genre" , "kind" or "sort", from Latin "genus" (stem "gener-"), Greek , "gés") , All About the Future is a 1953 anthology of science fiction short stories edited by Martin Greenberg . The stories originally appeared in the magazines Astounding , Galaxy Science Fiction and the Boston University Graduate Journal ., The supernatural (Medieval Latin: "superntrlis": "supra" "above" + "naturalis" "natural", first used: 15201530 AD) includes all that cannot be explained by science or the laws of nature, including things characteristic of or relating to ghosts, gods, or other supernatural beings, or to things beyond nature., Extraterrestrial life, also called alien life (or, if it is a sentient or relatively complex individual, an "extraterrestrial" or "alien"), is life that does not originate from Earth. These as-yet-hypothetical life forms may range from simple single-celled organisms to beings with civilizations far more advanced than humanity. Although many scientists expect extraterrestrial life to exist, there is no unambiguous evidence for its existence so far. The science of extraterrestrial life is known as exobiology., Speculative fiction is a broad umbrella genre denoting any narrative fiction with supernatural or futuristic elements; this encompasses the genres of science fiction, fantasy, horror, alternative history, magic realism, and superhero fiction, as well as combinations of the previous genres. It typically strays strongly from reality and so may feature fictional types of beings like mythical creatures and supernatural entities, technologies that do not exist in real life like time machines and interstellar spaceships, or magical or otherwise scientifically inexplicable elements. The term's popularity is sometimes attributed to Robert Heinlein, who referenced it in 1947 in an editorial essay, although there are prior mentions of speculative fiction, or its variant "speculative literature"., Martin Greenberg (28 June 1918-20 October 2013) Is an American book publisher and editor of science fiction anthologies., Galaxy Science Fiction was an American digest-size science fiction magazine, published from 1950 to 1980. It was founded by an Italian company, World Editions, which was looking to break into the American market. World Editions hired as editor H. L. Gold, who rapidly made "Galaxy" the leading science fiction (sf) magazine of its time, focusing on stories about social issues rather than technology., Fantasy is a fiction genre set in an imaginary universe, often but not always without any locations, events, or people from the real world. Most fantasy uses magic or other supernatural elements as a main plot element, theme, or setting. Magic and magical creatures are common in many of these imaginary worlds. Fantasy is generally distinguished from the genres of science fiction and horror by the expectation that it steers clear of scientific and macabre themes, respectively, though there is a great deal of overlap between the three, all of which are subgenres of speculative fiction., Subject: all about the future, Relation: instance_of, Options: (A) 1918 (B) application (C) april (D) art (E) book (F) category (G) collection (H) company (I) complex (J) concept (K) copy (L) craft (M) dc comics (N) device (O) editor (P) emphasis (Q) engineering (R) enterprise (S) extraterrestrial life (T) february (U) fiction (V) format (W) galaxy (X) genre (Y) history (Z) idea ([) internet (\) june (]) literature (^) machine (_) may (`) october (a) part (b) philosophy (c) physics (d) plot (e) point (f) point in time (g) print (h) production (i) science (j) science fiction (k) science fiction magazine (l) set (m) size (n) society (o) space (p) supernatural (q) technology (r) three (s) time (t) time machine (u) travel (v) two (w) vehicle
Output: book