On the March 4 episode of Neil deGrasse Tyson's StarTalk, the astrophysicist did an interview with theoretical physicist Stephen Hawking.
On Wednesday, after news of Hawking's passing, National Geographic published the commercial-free episode in full on its YouTube channel.
It's a delightful discussion, covering questions Hawking would ask Isaac Newton, time travel, and, naturally, his favorite drink (Pimm's!). The interview begins at the 3:27 mark.
