right leg pinned under the Protoceratops body with its left sickle claw oriented into the throat region. The Protoceratops bit the right hand of the predator, implying that it was unable to escape. Barsbold suggested that both animals drowned as they fell into a swamp-like body of water or, the relatively quicksand-like bottom of a lake could have kept them together during the last moments of their fight. Osmólska in 1993 proposed another two hypotheses in order to explain their preservation. During the death struggle a large dune may have collapsed simultaneously burying both Protoceratops and Velociraptor. Another proposal is that the Velociraptor was scavenging an already dead Protoceratops when it got buried and eventually killed by indeterminate circumstances. In 1995 David M. Unwin and colleagues cast doubt on previous explanations especially a scavenging hypothesis as there were numerous indications of a concurrent death event. For instance, the Protoceratops has a semi-erect stance and its skull is nearly horizontal, which could have not been possible if the animal was already dead. The Velociraptor has its right hand trapped within the jaws of the Protoceratops and the left one grasping the Protoceratops skull. Moreover, it lies on the floor with its feet directed to the prey's belly and throat areas, indicating that this Velociraptor was not scavenging. Unwin and colleagues examined the sediments surrounding the specimen and suggested that the two were buried alive by a powerful sandstorm. They interpreted the interaction as the Protoceratops being grasped and dispatched with kicks delivered by the low-lying Velociraptor. They also considered possible that populations of Velociraptor were aware of crouching behaviors in Protoceratops during high-energy sandstorms and used it for successful hunts. Kenneth Carpenter in 1998 considered the Fighting Dinosaurs specimen to be conclusive evidence for theropods as active predators and not scavengers. He suggested another scenario where the multiple wounds delivered by the Velociraptor on the Protoceratops throat had the latter animal bleeding to death. As a last effort, the Protoceratops bit the right hand of the predator and trapped it beneath its own weight, causing the eventual death and desiccation of the Velociraptor. The missing limbs of the Protoceratops were afterwards taken by scavengers. Lastly, both animals were buried by sand. Given that the Velociraptor is relatively complete, Carpenter suggested that it may have been completely or partially buried by sand. In 2010 David Hone with team reported a new interaction