to systematically chewing bone like hyenas do to extract marrow. Gregory Paul also wrote that a bone-crushing bite would also have been advantageous to a predator; providing the extreme bite force to kill prey and later consume it efficiently. Other paleontologists would also find similarities between Tyrannosaurus teeth and those of other predators. Farlow and Holtz pointed out that like Tyrannosaurus, orcas and crocodiles also had broad-based teeth. Holtz noted the similarities between Tyrannosaurus teeth and those of hyaenids, but further added that all hyaenids are known to kill prey, with the largest (Crocuta crocuta) obtaining most of its food through this means. He also notes that hyaenids mainly crunch bone with their molars and premolars. Holtz also pointed out that felids also developed thickened teeth as adaptations to resist contact with bone during prey capture or dispatch as well as during feeding. Since at least some of Tyrannosauruss potential prey could move quickly, evidence that it walked instead of ran could indicate that it was a scavenger. On the other hand, recent analyses suggest that Tyrannosaurus, while slower than large modern terrestrial predators, may well have been fast enough to prey on large hadrosaurs and ceratopsians. Other evidence suggests hunting behavior in Tyrannosaurus. The eye-sockets of tyrannosaurs are positioned so that the eyes would point forward, giving them binocular vision slightly better than that of modern hawks. Horner also pointed out that the tyrannosaur lineage had a history of steadily improving binocular vision. It is not obvious why natural selection would have favored this long-term trend if tyrannosaurs had been pure scavengers, which would not have needed the advanced depth perception that stereoscopic vision provides. In modern animals, binocular vision is found mainly in predators. A 2021 study focusing on the vision and hearing of the small theropod Shuvuuia, to which Tyrannosaurus was compared suggests that Tyrannosaurus was a diurnal animal and would have hunted or scavenged predominantly during daylight hours, a feature it shared with the dromaeosaurid Dromaeosaurus, which was also compared to Shuvuuia in the study. Furthermore, fossil evidence of tyrannosaur attacks on other dinosaurs have been discovered. A pair of hadrosaur caudal (tail) vertebrae found in 2007 was described by David Burnham et al. in 2013 has the tip of an adult Tyrannosaurus tooth embedded in the bone, with evidence of new bone growth that wrapped around the tooth. Burnham and his colleagues suggest that this