Icelandic horse them. Horses played a significant part in Norse mythology, and several horses played major roles in the Norse myths, among them the eight-footed pacer named Sleipnir, owned by Odin, chief of the Norse gods. Skalm, a mare who is the first Icelandic horse known by name, appeared in the "Book of Settlements" from the 12th century. According to the book, a chieftain named Seal-Thorir founded a settlement at the place where Skalm stopped and lay down with her pack. Horses also play key roles in the Icelandic sagas "Hrafnkel's Saga", "Njal's Saga" and "Grettir's Saga". Although written in the 13th
Domestication of the horse as efficient at utilizing the full strength of the animals as the later-invented padded horse collar that arose several millennia later. A 2005 study analyzed the mitochondrial DNA (mtDNA) of a worldwide range of equids, from 53,000-year-old fossils to contemporary horses. Their analysis placed all equids into a single clade, or group with a single common ancestor, consisting of three genetically divergent species: "Hippidion", the New World stilt-legged horse, and the true horse. The true horse, which ranged from western Europe to eastern Beringia, included prehistoric horses and the Przewalski's Horse, as well as what is now the modern domestic