NASA: National Aeronautics and Space Administration


Ask an Astrobiologist
"When we discover extra-terrestrial life, how will this information be distributed to the public?"
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  1. Question

    Im doing a research paper on aliens, i would like to know: what is the most solid proof so far?

    There is no proof whatever of the existence of aliens. We may expect the universe to be teeming with life, but we have not actually detected any evidence yet of the existence of such life. David Morrison
    NAI Senior Scientist

    April 2, 2007