represent the eggs of oviraptorids. This find proved that the nest AMNH 6508 belonged to Oviraptor and rather than an egg-thief, the holotype was actually a mature individual that perished brooding the eggs. Moreover, phylogenetic analyses published in 2008 by Darla K. Zelenitsky and François Therrien have shown that Protoceratopsidovum represents the eggs of a maniraptoran more derived than oviraptorids and not Protoceratops. The description of the eggshell of Protoceratopsidovum has further confirmed that they in fact belong to a maniraptoran, possibly deinonychosaur taxon. Nevertheless, in 2011 an authentic nest of Protoceratops was reported and described by David E. Fastovsky and colleagues. The nest (MPC-D 100/530) containing 15 articulated juveniles was collected from the Tugriken Shireh locality of the Djadokhta Formation during the work of Mongolian-Japanese paleontological expeditions. Gregory M. Erickson and team in 2017 reported an embryo-bearing egg clutch (MPC-D 100/1021) of Protoceratops from the also fossiliferous Ukhaa Tolgod locality, discovered during paleontological expeditions of the American Museum of Natural History and Mongolian Academy of Sciences. This clutch comprises at least 12 eggs and embryos with only 6 embryos preserving nearly complete skeletons. Norell with colleagues in 2020 examined fossilized remains around the eggs of this clutch which indicate a soft-shelled composition. Fighting Dinosaurs The Fighting Dinosaurs specimen preserves a Protoceratops (MPC-D 100/512) and Velociraptor (MPC-D 100/25) fossilized in combat and provides an important window regarding direct evidence of predator-prey behavior in non-avian dinosaurs. In the 1960s and early 1970s, many Polish-Mongolian paleontological expeditions were conducted to the Gobi Desert with the objective of fossil findings. In 1971, the expedition explored several localities of the Djadokhta and Nemegt formations. On August 3 several fossils of Protoceratops and Velociraptor were found including a block containing two of them at the Tugriken Shire locality (Djadokhta Formation) during fieldworks of the expedition. The individuals of this block were identified as a P. andrewsi and V. mongoliensis. Although it was not fully understood the conditions surrounding their burial, it was clear that they died simultaneously in struggle. The specimen shortly became notorious and was nicknamed the Fighting Dinosaurs. It has been examined and studied by numerous researchers and paleontologists, debating on how the animals got buried and preserved altogether. Though a drowning scenario has been proposed by Barsbold, such hypothesis is considered unlikely given the arid paleoenvironments or settings of the Djadokhta Formation. It is generally accepted that they were buried alive by