Planetary Radio: Space Exploration, Astronomy and SciencePlanetary Radio: Space Exploration, Astronomy and Science
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Discovering life elsewhere: How can we be sure?

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Is it life? NASA chief scientist Jim Green and Mary Voytek, leader of the agency’s astrobiology program, are two authors of a paper that calls for a system or scale that will allow scientists and others to evaluate the validity and importance of evidence that points to life elsewhere in the solar system or across the galaxy. Planetary Society communications strategy adviser Kate Howells shares our gift list for the space fan in your life, while Bruce Betts takes us across the night sky toward a new space trivia contest. There’s more to explore at https://www.planetary.org/planetary-radio/2021-jim-green-mary-voytek-astrobiology-scale

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Planetary Radio: Space Exploration, Astronomy and Science

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