We sit down with U.S. Poet Laureate Tracy K. Smith to discuss the ideas that drive her writing. Considered among the best poets of her generation, Smith won the Pulitzer Prize in 2011 for her collection, "Life on Mars," which melds science and science fiction with the discoveries, failures, and oddities of the human experience. She reads poems from her past collections and from her forthcoming book, "Wade in the Water," to be published in April 2018. (Season 2, Episode 09 - Revolutionary Writers)