The majority of dinosaurs in the museum are from the Gobi Desert. A passage from the Museum's website says (google translate):
The core of the exhibition paleontological create a dinosaur skeletons found in the Gobi Desert in the 60s and 70s by Polish-Mongolian paleontological expedition under the guidance of prof. Zofia Kielan-Jaworowski. The biggest hall Museum of Evolution almost completely fills the massive skeleton opistocelikaudii - representative of herbivorous dinosaurs called zauropodami. Attached to the long neck of the animal's head was described by another name (as nemegtozaur), because she was found a few kilometers away from the rest of the skeleton. Paleontologists, however, suspect that it could be one and the same animal.
In addition opistocelikaudii in the largest hall of the Museum of Evolution you can admire other exhibits gobijskie, including fossilized eggs of dinosaurs, armored dinosaurs and prarogatych, as well as small skull of primitive mammals that lived on Earth "in the shadow" of large dinosaurs.
The biggest impression on the visitors nevertheless have skeletons and skulls of bloodthirsty dinosaurs discovered in Cretaceous rocks of the Gobi Desert. They are stored in a separate room. Dominated by the big tarbosaurus, Asian American relative of T. rex, shown in two versions. The first shows the animal in an inclined posture, with the spine located parallel to the ground. This version, we now accept as valid. The second version shows tarbosaurus in the kangaroo position, as he had imagined a few decades ago. As you can see, not only the dinosaurs, but also our ideas about them underwent constant evolution. The most intriguing fossils in the hall of large predators is deinocheirus. To have survived only a huge front paws of the animal, culminating big claws.
