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They are cast in very dense hydrostone and finished with actual dig site matrix so that it is very difficult to tell the casts from the actual bones
Except for the extinct subspecies of modern polar bear Ursus maritimus tyrannus and Arctotherium
Bruce Stinchcomb has a figure (3-26) in his book Worlds Oldest Fossils
Acheroraptor is an extinct genus of dromaeosaurid theropod dinosaur known from the Hell Creek Formation of Montana
everything that is in the 12 piece set is in the 25 piece set and everything that is in the 25 piece set is in the 50 piece set and so on
Albertosaurus, maxilla Troodon They are cast in veryAlbertosaurus was a large, meat eating dinosaur from the late Cretaceous period about 68 to 65 million years ago. It was a theropod related to T. rex but smaller in size. Albertosaurus was about 8. 6 m long and weighed about 2500 kg. This replica is cast from a specimen found in Alberta, Canada. The original fossil is in the Royal Ontario Museum. Shipping Included