Extraterrestrial life

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Image:Arecibo.arp.750pix.jpg
The Arecibo Observatory in Puerto Rico, currently used by the SETI project in the search for extraterrestrial life

Extraterrestrial life is life that is not from the planet Earth. It is not known if there is any extraterrestrial life. There is no proof that it exists.

Most scientists believe that if extraterrestrial life exists, its evolution would have happened in different places in the universe. Others believe that life started on a small number of planets and spread to other planets.

Extraterrestrial life forms are often referred to in popular culture as aliens or ETs.


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