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To Be or Not to Be Signaling the Aliens: That Is the Question for SETI - NBCNews.com
http://www.nbcnews.com/science/space/be-or-not-be-signaling-aliens-question-seti-n305546Now some experts on the search for extraterrestrial intelligence, or SETI, think it's time for a sustained effort to send signals out to extraterrestrial civilizations, even though there's no sign of their existence. Others think that's a terrible idea ...
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