This week I speak with theoretical physicist (Caltech), Sean Carroll. We talk about his new book entitled, The Big Picture: On the Origins of Life, Meaning, and the Universe Itself. The author of two previous books on physics for popular audiences (From Eternity to Here, The Particle at the End of the Universe), Sean now turns his attention to questions of meaning, purpose and ethics, weaving this subjects together with his understanding of physics. Mentioned in this episode: Sean Carroll's Website: www.preposterousuniverse.com Sean Carroll's Twitter: www.twitter.com/seanmcarroll The Big Picture, by Sean Carroll http://amzn.to/2nMb1pj Scale, by Geoffrey West http://amzn.to/2oDHIJA