(Greenland Dog) descended from dogs associated with Thule people, who relied on them for transportation from Siberia. In 2015, a study using a number of genetic markers indicated that these were both the same dog and should not be treated as separate breeds, that they maintain an indigenous heritage that predates colonization and the timing corresponds with the arrival of the Thule people, and that they were distinct from Siberian Huskies, Alaskan Huskies and Malamutes. The maternal mitochondrial DNA sequences of the Inuit dogs were classified as haplotype A31 that indicates a common female ancestor, and this haplotype could not be found in other modern dogs but the nearest match was with a 1,000 year-old dog from Florida. Nearly all dog breed's genetic closeness to the grey wolf is due to admixture. However, several Arctic dog breeds show a genetic closeness with the now-extinct Taimyr wolf of North Asia due to admixture. These breeds are associated with high latitudes – the Siberian Husky and Greenland Dog that are also associated with Arctic human populations, and to a lesser extent the Shar Pei and Finnish Spitz. An admixture graph of the Greenland dog indicates a best-fit of 3.5% shared material, however an ancestry proportion ranging between 1.4% and 27.3% is consistent with the data. This indicates admixture between the Taymyr wolf population and the ancestral dog population of these 4 high-latitude breeds. This introgression could have provided early dogs living in high latitudes with phenotypic variation beneficial for adaption to a new and challenging environment. It also indicates the ancestry of present-day dog breeds descends from more than one region. In 2020, a genetic study found that Greenland sled dogs have been kept isolated from other breeds since their arrival in Greenland with the Inuit 850 years ago. Their lineage traces more genomic history than other arctic-breeds to their ancestor's remains which were found on Zhokhov Island, arctic northeastern Siberia and dated to be 9,500 years old. Description Appearance The Greenland Dog is a powerful, heavy-built dog. It has a broad, wedge-shaped head, slightly tilted eyes and small, triangular ears covered with thick fur that prevents frostbite. It has strong, muscular, short-haired legs. The tail is usually rolled along/across its back. When it lies down and curls up to rest, the tail often covers the nose. Its coat is of medium length and consists of two layers. The inner layer consists