When they looked closer, Farke and his volunteers found it was part of a collection of toe bones. Nearby, the team found the skull of the dinosaur that they would later discover to be a young Parasaurolophus, a Late Cretaceous herbivore that sported a large crest protruding from the back of its head. The 6-foot-long dinosaur seems to have been about a year old when it died, making it a rare find for paleontology. Named "Joe," it's the youngest, smallest and most complete fossil of Parasaurolophus ever found. At adult size, Joe might have grown to be up to 25 feet long.