The Siberian Husky (Russian: Сибирский хаски, tr. Sibirskiy khaski) is a medium-sized working dog breed. The breed belongs to the Spitz genetic family. Siberian Huskies originated in Northeast Asia where they are bred by the Chukchi people for sled-pulling, guarding, and companionship. It is an active, energetic, resilient breed, whose ancestors lived in the extremely cold and harsh environment of the Siberian Arctic. William Goosak, a Russian fur trader, introduced them to Nome, Alaska during the Nome Gold Rush, initially as sled dogs. William Goosak, a Russian fur trader, introduced them to Nome, Alaska during the Nome Gold Rush, initially as sled dogs. The first of the dogs arrived in the Americas 12,000 years ago around the commencement of the Holocene period, however people and their dogs did not settle in the Arctic until the Paleo-Eskimo people 4,500 years ago and then the Thule people 1,000 years ago, with both emigrating from Siberia. They were separate to the two Inuit dogs, the Canadian Eskimo Dog and the Greenland Dog.