Topic summary
Extraterrestrials in fiction
An extraterrestrial or alien is a lifeform that does not originate on Earth. Extraterrestrials are a common theme in modern science fiction but also appear in much earlier works.
Topic summary
An extraterrestrial or alien is a lifeform that does not originate on Earth. Extraterrestrials are a common theme in modern science fiction but also appear in much earlier works.