In a first for paleontologists, the perfectly preserved anus of a dinosaur has been found in China. Psittacosaurus, a Cretaceous-period relative of the Triceratops, was about the size of a dog, and researcher Jakob Vinther of the University of Bristol in the United Kingdom described the discovery as “unique” to Live Science. “It’s like a Swiss Army knife of excretory openings,” used for pooping, peeing, breeding and egg laying. It was not clear to the researchers whether the dinosaur was male or female.