100 Tögrög Dinosaurs Nemegtosaurus

Nemegtosaurus mongoliensis was named for the Nemegt Formation in the Gobi Desert, where Mongolian and Polish joint expeditions in the 1960s and 1970s recovered some of the most significant Late Cretaceous sauropod material ever found. Mongolia's late-1980s dinosaur series was among the earliest national coinage programs to treat paleontology as a serious numismatic subject rather than novelty — issued just as the country remained firmly within the Soviet sphere, with Mongolian science heavily intertwined with USSR-sponsored excavation programs.