Neil deGrasse Tyson explains why finding alien life would change everything we know about our own world.
Produced by Darren Weaver and Kamelia Angelova. Additional production by Kevin Reilly.
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StarTalk Radio is a podcast and radio program hosted by astrophysicist Neil deGrasse Tyson, where comic co-hosts, guest celebrities, and scientists discuss astronomy, physics, and everything else about life in the universe. Follow StarTalk Radio on Twitter, and watch StarTalk Radio "Behind the Scenes" on YouTube.