Look up extraterrestrial, extra-, terrestrial, or extra in Wiktionary, the free dictionary. Extraterrestrial refers to any object or being beyond (extra-)...

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

An extraterrestrial or alien is any extraterrestrial lifeform: a lifeform that did not originate on Earth. The word extraterrestrial means "outside Earth"...

Extraterrestrial intelligence (often abbreviated ETI), or non-human intelligence (NHI), refers to hypothetical intelligent extraterrestrial life. No such...

ark Generation ship Extraterrestrial surface settlement Moonbase Mars base Extraterrestrial floating settlements Extraterrestrial underground settlements...

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

The cultural impact of extraterrestrial contact is the corpus of changes to terrestrial science, technology, religion, politics, and ecosystems resulting...

This is a list of lists of fictional extraterrestrial species. A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z List of Noon...

refer to a pseudoscientific set of beliefs that hold that intelligent extraterrestrial beings visited Earth and made contact with humans in antiquity and...

referred to as Zeta Reticulans, Roswell Greys or Greys, are purported extraterrestrial beings. They are frequent subjects of close encounters and alien abduction...