Guest: Vince Beiser, Journalist and Author of “The World in a Grain: The Story of Sand and How It Transformed Civilization”

Sand isn’t just a nuisance in your sandals and swimsuit. It’s a critical ingredient in your life. Just take a look around you. Roads, sidewalks, buildings, windows – all require sand. So does your phone and computer. So that’s surprising to realize. But an even bigger surprise, for me, is the fact that the world is running out of sand. How can that be possible?

Listen here.