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Q&A Would advanced extraterrestrial life really use radio signals as the way to communicate over interstellar distances?

When we think to interstellar communications, we immediately think to radio signals with medium or large antennas : We all know about radio signals in seti. In the case of fictional stories, s...

4 answers  ·  posted 9y ago by user2284570‭  ·  last activity 9y ago by user2284570‭

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