It looks like a particularly chilly winter’s day as two Apsaroke men sit astride their horses in this Edward S. Curtis photo from 1908. The Apsaroke people – also known as the Crow – were part of the Sioux Nation of Plains Indians. They traditionally lived around the Yellowstone River, although they later settled in Montana and divided into two groups: the River Crow and the Mountain Crow. Photo Credit: Buyenlarge/Getty Images