Many of these Ice Age subspecies died out during the rapid climate changes associated with the end of the last Ice Age or were hunted out by humans, particularly in North America, where the horse became completely extinct.
Many of these Ice Age subspecies died out during the rapid climate changes. These rapid climate changes were associated with the end of the last Ice Age. Many of these Ice Age subspecies were hunted out by humans, particularly in North America. The horse became completely extinct.