If aliens are watching Earth, they might be able to detect us from the radio signals we beam to Mars to control our rovers there. Astronomers have now listened in on the nearby TRAPPIST-1 system to check whether aliens are chattering between their own neighboring planets.Continue ReadingCategory: Space, ScienceTags: Extraterrestrial, Life, TRAPPIST-1, Astronomy, Radio, Pennsylvania State University, SETI

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