By Neil deGrasse Tyson
Published September 13, 2014 5:08pm
Our special tribute features the best of Neil deGrasse Tyson and Lynne Koplitz’s interview with the late Joan Rivers, plus new reflections by comedians Eugene Mirman, Chuck Nice and Leighann Lord.
Read more and listen to the full episode: http://www.startalkradio.net/show/a-tribute-to-joan-rivers
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