Planetary Radio: Space Exploration, Astronomy and SciencePlanetary Radio: Space Exploration, Astronomy and Science

Looking for E.T.'s Laser Beam: An Optical SETI Update

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An update on the Optical Search for Extraterrestrial Intelligence from Harvard's Paul Horowitz.Learn more about your ad choices. Visit megaphone.fm/adchoices

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Planetary Radio brings you the human adventure across our solar system and beyond. We visit each wee 
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