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An extraterrestrial or alien is a lifeform that did not originate on Earth. The word extraterrestrial means "outside Earth". Extraterrestrials are a common theme in modern science-fiction , and also appeared in much earlier works such as the second-century parody True History [ 1 ] by Lucian of Samosata .
List of Doctor Who universe creatures and aliens; List of Star Trek aliens; List of Star Wars creatures; Lists of Star Wars species: A–E, F–J, K–O, P–T, U–Z; Species of the Marvel Cinematic Universe
List of dragons. List of dragons in mythology and folklore; List of dragons in literature; List of dragons in popular culture; List of dragons in film and television; List of dragons in games; List of fictional dinosaurs
Science fiction is "a genre (of literature, film, etc.) in which the setting differs from our own world (e.g. by the invention of new technology, through contact with aliens, by having a different history, etc.), and in which the difference is based on extrapolations made from one or more changes or suppositions; hence, such a genre in which ...
A popular subset of speculative evolution is the exploration of possible realistic extraterrestrial life and ecosystems. Speculative evolution writings focusing on extraterrestrial life, like the blog Furahan Biology, use realistic scientific principles to describe the biomechanics of hypothetical alien life. [28]
Novum (Latin for new thing) is a term used by science fiction scholar Darko Suvin and others to describe the scientifically plausible innovations used by science fiction narratives. [1] Frequently used science fictional nova include aliens, time travel, the technological singularity, artificial intelligence, and psychic powers. [2]
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.
For example, during the Barney and Betty Hill incident, the first recorded claim of an alien abduction, the couple reported that they were abducted and experimented on by aliens with oversized heads, big eyes, pale grey skin, and small noses, a description that eventually became the grey alien archetype once used in works of fiction. [172]