Cosmic Queries – Silicon Aliens with David Grinspoon
StarTalk Radio
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Mission Impossible - The Unspoken Protocol
Neil deGrasse Tyson: There's a set of assumptions that are almost unspoken because of how long we've been assuming them and how frequently we assume them. David Grinspoon is an expert on the solar system and astrobiology. Let's find out about the unspoken protocol. That's the next installment of Mission Impossible.
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