Polar Bears on the Edge of a Warming World

Polar bear cub Nora was born at the Columbus Zoo in Ohio, and quickly abandoned by her mother. Though Nora struggled with weak bones and a lack of companionship, she was ultimately able to find Hope–quite literally. Guest: Kale Williams, author of "The Loneliest Polar Bear: A True Story of Survival and Peril on the Edge of a Warming World"