Grouping | Science fiction |
---|---|
Similar entities | Cryptids |
Other name(s) | Aliens, space aliens |
An extraterrestrial or alien is any extraterrestrial lifeform: a lifeform that did not originate on Earth. The word extraterrestrial means "outside Earth". The first published use of extraterrestrial as a noun occurred in 1956, during the Golden Age of Science Fiction.[1][dubious ]
Extraterrestrials are a common theme in modern science-fiction, and also appeared in much earlier works such as the second-century parody True History[2] by Lucian of Samosata.[3]
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