How much of a dinosaur you see in photographs and museums is the authentic dinosaur? Well, it depends on the dinosaur.

Leroy Kameron Durrant, an undergraduate student at the University of Wyoming (UW), reexamined “Reed’s Allosaurus,” a historically significant dinosaur specimen found near Laramie almost 150 years ago.

The result was a fascinating insight into a thoroughly plastered prehistoric beast.

“There’s plaster and paint over most of the bones, and one bone had three or four metal wires drilled through it,” Durrant told Cowboy State Daily. “But seeing broken bones isn’t fun, so that’s what they did to get it ready for display in the museum.”

Durrant and the other UW researchers had to look inside the bones to determine how much dinosaur they had to work with. To do that, the 150-million-year-old fossils had to go to the hospital.