The Greenland Dog (Greenlandic: Kalaallit Qimmiat, Danish: Grønlandshund) is a large breed of husky-type dog kept as a sled dog. They were brought from Siberia to North America by the Thule people 1,000 years ago, along with the Canadian Eskimo Dog that is genetically identical. As is common among sled dogs, Greenland Dogs are able to traverse very difficult terrain with ease and with a high tempo. As working dogs they are especially valued for their physical strength and endurance. It is thought that the first dogs were brought to Britain around 1750; an Esquimaux bitch was exhibited at one of the earliest dog shows held in Darlington on 29 July 1875, which was reported in the Live Stock Journal and Fanciers Gazette published on 6 August 1875. They were recognized by the Kennel Club at its foundation in 1880. Greenland dogs are classified as Spitz breeds, a group of dogs characterized by their prick ears, curly tails and thick coats and are among the oldest known dog breeds in the world today.