Stephen Hawking

Host Neil deGrasse Tyson features his interview with world-renowned physicist and cosmologist Stephen Hawking. Tyson is joined in the Hall of the Universe by comedian co-host Matt Kirshen, along with theoretical physicists Janna Levin and Michio Kaku, to discuss some of the mysteries of our universe. Adding to the discussion, Bill Nye the Science Guy weighs in from the Griffith Observatory in Los Angeles.