Small dinosaurs once lived in the desert in today’s Mongolia and northern China. Their great night vision and strong hearing made them deadly predators during the nighttime. Scientists said Thursday they have found a circle of bones around the eye of a dinosaur called Shuvuuia Deserti. The bones were inside the skull, which holds the hearing organ. Scientists say the dinosaur had hearing and sight abilities much like an owl, meaning it could hunt in the dark. Their study was published in the journal, Science. The research showed that most predatory dinosaurs had good hearing, but their sight worked best during the daytime. The Shuvuuia, however, loved nightlife. The two-legged dinosaur was the size of a large bird and weighed about as much as a house cat. It had many small teeth, like pieces of rice. It was lightweight and lived during the Cretaceous Period, about 75 million to 81 million years ago.