Neil DeGrasse Tyson Separates Fact From Fiction In 'Interstellar'

Astrophysicist Neil deGrasse Tyson has been tweeting about the science behind Interstellar.
 In an interview with NPR's David Greene, Tyson goes beyond those tweets, deep into wormholes, relativity and even some spoilers. Here's the non-spoiler version of what he had to say.