SPORTS A mixed heritage gives sled dogs their love of running, a desire to work, and a need for wild places. And right now, sled dogs around the world are busy preparing for the upcoming racing season, including the premier event—Alaska’s Iditarod Trail Sled Dog Race. (National Geographic News) See what it takes to be a vet at the Iditarod. Teachers, scroll down for a … Continue reading What Makes a Great Sled Dog?