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The concept of extraterrestrial life, and particularly extraterrestrial intelligence, has had a major cultural impact, especially extraterrestrials in fiction. Science fiction has communicated scientific ideas, imagined a range of possibilities, and influenced public interest in and perspectives on extraterrestrial life.
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 .
The following outline is provided as an overview of and topical guide to extraterrestrial life: Extraterrestrial life – is any type of lifeform, from prokaryotes to intelligent beings, that is neither native of Earth or transplanted from it. So far, no extraterrestrial life has ever been found. [1]
This is a list of extraterrestrial beings that have been reported in close encounters, claimed or speculated to be associated with unidentified flying objects (UFOs) (not to be confused with the meaning of the term "alien species" in the biological science of ecology).
The extraterrestrial hypothesis is the idea that some UFOs are vehicles containing or sent by extraterrestrial beings (usually called aliens in this context). [13] As an explanation for UFOs, ETI is sometimes contrasted with EDI (extradimensional intelligence), for example by J. Allen Hynek. [24]
Extraterrestrial may refer to: Extraterrestrial life , life that occurs outside of Earth and that probably did not originate from Earth Extraterrestrial (TV program) , a program on the National Geographic Channel
The idea of extraterrestrial life, which was once a radical notion held by limited and specific people, became an accepted idea discussed in college classrooms. The change was also possible because of the changes in religious and philosophical thinking that took place at the time. [25] Besides that, there was much speculation.
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