The batman of Mexico has his own bat-cave. He just shares it with 4,000 Mexican long-nosed bats. In this episode, join researcher Rodrigo Medellin as he descends into the Devil’s Cave just north of Mexico City. It’s a journey that started decades ago when Medellin was on a game show as a boy. He lost the game show, but won a prize far more valuable—for himself, his students, and Mexico’s bats. Ari Daniel Shapiro reports from Tepoztlán.