Frank Drake aimed an 85-foot radio dish at Tau Ceti and Epsilon Eridani in April 1960, conducting Project Ozma as the first modern experiment in the search for extraterrestrial intelligence. His two Sun-like targets yielded nothing after several weeks of listening on the 1,420 MHz hydrogen line. That null result set a pattern repeated across sixty-six years of surveys: instruments improved by factors of millions, candidate lists expanded from tw…
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