BOZEMAN, Mont., Dec. 7 (UPI) -- U.S. paleontologists say enormous fossil bones collected in New Mexico are from North America's biggest dinosaur, which lived about 69 million years ago.
Research from Montana State University's Museum of the Rockies and the State Museum of Pennsylvania say the bones belonged to the sauropod dinosaur Alamosaurus sanjuanensis, a long-necked plant eater previously thought to reach 60 feet in length, an MSU release said Wednesday.