The global demand for sand has led to shortages, environmental damage, and black market crime. Where do we go from here? On this edition of Conversations, Vince Beiser joins us to talk about his book, The World in a Grain: The Story of Sand and How It Transformed Civilization. Beiser is an award-winning writer whose work has appeared in Wired, Harper's, The Atlantic, Mother Jones, and Rolling Stone, among other publications.