Neuroscientist and doctor Kieran Fox explores Albert Einstein's little-discussed spirituality and it how it both informed and complemented his science in Fox's new book "I Am Part of Infinity." It draws on little-known conversations, recently published letters and new archival research on what Einstein really believed and why his perspective still matters today. (0:45)Then, author Timothy Morton draws on philosophers Kant and Heidegger to reframe what it means to be ecological, and what sorts of actions count as we head into an age of mass extinction in his book, "Being Ecological." (26:14)