The evolution of the horse occurred over a Period of 50 million years, transforming the small, dog-sized, forest-dwelling Eohippus into the modern horse. The horse has developed dramatically over thousands of years. One of the first was, Hyracotherium, also known as Eohippus, they were small, short-legged and had toes. Their teeth were good for browsing, but not sturdy enough for chewing stiff grasses. Relics of these creatures came when the dinosaurs died out. Eohippus, over thousands of years, gradually “morphed” into what is today’s horse. First, the horse’s habitat changed from lush forests to tough grasslands, so it lost its toes in favor of hooves. After Eohippus the horse lost its toes grew taller and changed into Mesohippus then, merychippus and eventually growing larger and stronger into Epuus. In 2000 BCE a horse called a celt was discovered, They were small gaited horses, they were mostly bay colored. Also in 2000 BCE, primitive wagons dating from this time have been found in excellent condition in Armenia. These are the oldest known wagons in the world. Through the years the horse gradually became taller stronger and more useful to man kind.
Some of the first discovered horses where found in the Americas during the Ice Age. Some of those horses left to migrate to Asia by the Bering Land Bridge between Siberia and the Yukon. They spread across Europe, India and Africa. No one knows why but the horses that stayed in the Americas died out. For ten thousand years after the Ice age there were no horses in the Americas. After those ten thousand years Horses arrived to the Americas in slings in ships from Spain, and some say, from Norway.