Celebrating Carl Sagan With Lou Friedman, Lynda Obst, Kip Thorne and More

November 9 was Planetary Society founder Carl Sagan's birthday, so we gathered a few of his close friends and several young scientists he inspired in front of a live audience. They also helped us celebrate Planetary Radio's 10th anniversary! Learn more about your ad choices. Visit megaphone.fm/adchoices

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