Daniel Ackerman is a Boston-based writer and audio producer, covering science and the environment. His audio stories have aired on NPR, Marketplace, 99% Invisible, Minnesota Public Radio and WGBH News, while his writing appears in National Geographic, The Washington Post andĀ Scientific American, among others. He holds a PhD in ecology from the University of Minnesota. Daniel has reported from the bottom of a sinkhole and interviewed former presidential candidates (though not at the same time).