The Hunt for Elusive Truffles

The truffle, an underground fungus, is elusive, expensive, and irresistible. People train dogs for years, crawl around in the dark and the mud, and spend up to hundreds of thousands of dollars to acquire this delicacy. Guest: Rowan Jacobson, "Truffle Hound: On the Trail of the World’s Most Seductive Scent, with Dreamers, Schemers, and Some Extraordinary Dogs"