Daspletosaurus, Chicago Field Museum Daspletosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America between 77 and 74 million years ago, during the Late Cretaceous Period. http://paleontologyworld.com/
Museum of the Rockies - one of our favorite museums. Home to Dr. Jack Horner (paleontologist), great dinosaur displays - and during the summer, the Living History Farm (homestead reenactment), plus traveling displays, planetarium, etc. It's worth a detour to visit Bozeman and MOR!