Small three-toed horse from fossil beds in South Dakota
Three-toed Hipparion from the Niobrara beds in South Dakota, an ancestor of the horse.
Hand-colored halftone reproduction of a 1903 illustration
© North Wind Picture Archives
American, Ancestral Horse, Animal, Art, Dakota, Evolution, Extinct, Extinct Species, Extinction, Fossil, Fossil Horse, Hipparion, Historic, History, Horse, Horse Ancestor, Illustration, Mammal, Natural History, Natural Selection, Niobrara, North America, Paleontology, Pre Historic, Science, South Dakota, Three Toed Horse, United States, Us A