astronomy) Extraterrestrial life, alien life, or colloquially simply aliens, is life which does not originate from Earth. No extraterrestrial life has yet...

The existence of extraterrestrial life is a scientific idea that has been debated for centuries. Initially, the question was purely speculative; in modern...

outline is provided as an overview of and topical guide to extraterrestrial life: Extraterrestrial life – is any type of lifeform, from prokaryotes to intelligent...

Extraterrestrial intelligence (often abbreviated ETI), a subset of Non-Human Intelligence (NHI), refers to hypothetical intelligent extraterrestrial life...

The search for extraterrestrial intelligence (SETI) is a collective term for scientific searches for intelligent extraterrestrial life, for example, monitoring...

An extraterrestrial or alien is a lifeform that did not originate on Earth. The word extraterrestrial means "outside Earth". The first published use of...

Earth Extraterrestrial intelligence, hypothetical intelligent extraterrestrial life Extraterrestrials in fiction List of alleged extraterrestrial beings...

locate intelligent life as opposed to analyzing the implications of contact with that life. The potential changes from extraterrestrial contact could vary...

ISBN 0-521-56564-2, OCLC 28928183 Crowe, Michael J. (1999), The Extraterrestrial Life Debate, 1750–1900, Courier Dover Publications, pp. 241–246, ISBN 0-486-40675-X...

the first evidence of extraterrestrial life on Mars. When members of the crew conduct their research, the rapidly evolving life-form proves to be far...