Some witnesses reported that in 1950 Enrico Fermi was discussing the possible existence of extraterrestrial intelligent beings with Edward Teller, Herbert York, and Emi Konopinski in Los Alamos. His opinion having been asked on the matter, he skeptically replied that he did not see any around. It sounds like just a joke, but actually it is a much more serious objection than may be apparent at first sight. Fermi was of the opinion that very long distance space flight will be possible (actually, he thought superluminal space travel was also likely), at least in the distant future, and that this possibility holds for any sufficiently technologically advanced civilization.1 Since nobody has ever supplied convincing evidence of the presence of extraterrestrials on our planet, we must conclude that they do not exist.
KeywordsSolar System Science Fiction Asteroid Belt Gravitational Lens Extraterrestrial Origin
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