Graduate student Scott Sampson, foreground, describes skeletal structures of exposed Wankel T.rex fossils for visitors and U.S. Army Corps of Engineer officials at the excavation site near Fort Peck, Mont., June, 1990. The specimen was found on Federal land under the jurisdiction of the Corps and is the property of the U.S. Government.
Wankel T. rex
Credit: Photo courtesy Museum of the Rockies