US astronomers have calculated different scenarios regarding the existence of alien civilizations and have come to the conclusion that they are likely extremely rare, but capable of establishing contact with human beings on Earth, an article published on the electronic portal arXiv.org says.
Intelligent alien civilizations could really exist in our galaxy, Jorge Soriano from the City University of New York and his colleagues argue in one of their publications released on arXiv.org.
Soriano's team has been trying to answer the Fermi paradox: the discrepancy between the strong likelihood of the existence of intelligent alien life and the absence of any visible proof of it.
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