Eric Larsen is a world-renowned polar explorer, mountaineer, and filmmaker who has been exploring the most remote regions of the planet for more than two decades. In one notable year, Larsen skied 751 miles to the South Pole, trekked 51 days to get to the North Pole, and then climbed Mount Everest. Nat talks with Eric Larsen about his inspiration for exploration, the complicated logistics of polar expeditions, and the effects of global warming on the polar ice caps.