We're Running out of Sand

Sand is a critical ingredient in your life. Roads, sidewalks, buildings, windows, phones, and computers–all require sand. It's surprising enough how pervasive sand is in our lives, but an even bigger surprise is the fact that the world is running out of sand. Journalist Vince Beiser has been tracking the story of sand for years and wrote a book called, "The World in a Grain: The Story of Sand and How it Transformed Civilization."