Ever since "Dracula," bats have been seen as terrifying threats that carry disease. They're actually essential to our agriculture and industry. In this episode of Constant Wonder, you'll meet an expert who can set the record straight. No wonder he's known as "The Batman of Mexico"; he's been obsessed with the flying mammals since he was young!

Guest: Rodrigo Medellin, Professor of Ecology at the National Autonomous University of Mexico