Guest: Neil Shubin, discoverer of Tiktaalik and author

"We are all star stuff." After discussing FFRF legal complaints in South Dakota and Arkansas, we take up on Carl Sagan's famous words by talking with paleontologist Neil Shubin, discoverer of Tiktaalik and author of the bestselling Your Inner Fish, whose newest book is The Universe Within: Discovering the Common History of Rocks, Planets, and People.