Is it true that Stephen Hawking warned humanity about the dangers of contact with alien civilizations?

 
Is it true that Stephen Hawking warned humanity about the dangers of contact with alien civilizations? - My, Stephen Hawking, Physics, Aliens, Civilization, Space, UFO, Universe, The science, Scientists, Person, Planet, Facts, Проверка, Research, Informative, Aliens, Longpost
Is it true that Stephen Hawking warned humanity about the dangers of contact with alien civilizations? - My, Stephen Hawking, Physics, Aliens, Civilization, Space, UFO, Universe, The science, Scientists, Person, Planet, Facts, Проверка, Research, Informative, Aliens, Longpost
Is it true that Stephen Hawking warned humanity about the dangers of contact with alien civilizations? - My, Stephen Hawking, Physics, Aliens, Civilization, Space, UFO, Universe, The science, Scientists, Person, Planet, Facts, Проверка, Research, Informative, Aliens, Longpost


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