Alan Townsend describes his early professional and personal life as marked by a naïve faith in the power of science to provide answers and solve problems. Townsend was already softening his early scientific dogmatism when his wife and his daughter were diagnosed with unrelated brain cancers. One survived, while the other did not, and this father and husband then had to choose how to how to put back the pieces, both of his life and of his view of a universe that once seemed to him so clear and logical. Guest: Alan Townsend, author of "This Ordinary Stardust: A Scientist's Path from Grief to Wonder"