Sean Swarner Completes Explorer’s Grand Slam With One Lung
Is there a place on this planet Sean Swarner hasn't stepped foot? Probably not. The 42-year-old adventurer best known as the first cancer survivor to summit Mt. Everest just traversed more than 70 miles to the North Pole, where the windchill tumbled to minus-80 degrees. Did I mention he only has one fully functioning lung and he was lugging a [...]