Dan Ulmer and wife, two fossil merchants share their motel room with a variety of large fossils. On the table next to the bed is a leg bone from a dinosaur and the skull of a prehistoric rhinoceros-like animal (Brontotherium sp.). Brontotherium was a genus of mammals that lived in the Lower Oligocene period about 35 million years ago in what is now North America. This photo was taken during the Fossil Fair at Tucson, Arizona, where amateur and commercial fossil collectors gather to trade in the remains of prehistoric animals. Although frowned upon by many academics, amateur collectors frequently find remains of new fossil species or very fine examples of known species. MODEL RELEASED (1991)