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. The collection was separated into those specimens that looked more wolf-like (i.e. the Beringian wolf), and those that looked more dog-like and in comparison to the skulls of Eskimo dogs from both Greenland and Siberia thought to be their forerunners.In 2015, a study using a number of genetic markers indicated that the Siberian Husky, the Alaskan Malamute and the Alaskan husky share a close genetic relationship between each other and were related to Chukotka sled dogs from Siberia.