Aliens are beings from beyond Earth; their existence has not been scientifically proven.
The full storyAliens: everything we have, with news, official files and videosAn alien, or extraterrestrial, is a being from beyond Earth. The term also refers to fictional characters from other worlds, not just to claims that life exists beyond Earth.
Scientists distinguish between the possibility of life beyond Earth and the possibility of intelligent life. So far, no clear scientific evidence has established that aliens exist. Claims that information about the subject is being concealed are not proof.
If life exists beyond Earth, it may be more likely to develop on planets with suitable conditions, including temperatures that allow liquid water, appropriate levels of radiation and a suitable chemical composition. This is a scientific assessment, not evidence that such life exists.
Aliens have not been scientifically proven to exist. Whether life exists beyond Earth remains an open question.
Extraterrestrial life is any form of life from beyond Earth. Intelligent life is a separate category referring to life with intelligence.
An alien, or extraterrestrial, is a being from beyond Earth. The word also refers to fictional characters from other worlds.
According to scientific estimates, life may be more likely to develop on planets with temperatures suitable for liquid water, appropriate levels of radiation and a suitable chemical composition.