Harvard physicist Cumrun Vafa is one of string theory’s strongest proponents. But this winter, other string theorists have been reeling from his latest conjecture, which might invalidate their ideas built on a decade-long assumption that dark energy is constant. Vafa’s work implies that dark energy’s value changes.
Episode 6: best and worst! The games, gadgets, movies and science stories that most caught our attention in 2015. We also chat with renowned theoretical physicist and string theorist, professor Brian Greene. Watch the expanded show in video or subscribe to the audio feed via iTunes and Pocket Casts.