StarTalk: Season 4, Episode 7 - ProjectFreeTV

4 - 7: Katy Perry

Host Neil deGrasse Tyson joins Grammy-nominated pop star Katy Perry in Los Angeles, where Tyson answers all of her cosmic queries. In the Cullman Hall of the Universe, comedian co-host Sasheer Zamata and astrophysicist Charles Liu join Tyson to discuss science in pop culture and music.