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giving it a potential Upper Cretaceous-Oligocene stratigraphic range
Discovered in 1994
6 feet) in length
The 3 images at right are of the original bone
Castor canadensis, beaver brain endocast Pachycephalosaurus giving it a potential UpperThis is a brain endocast of the a beaver. An endocast or endocranial cast is a cast made of the mold formed by the impression the brain makes on the inside of the neurocranium (braincase), providing a replica of the brain with most of the details of its outer surface. Endocasts can also form naturally, when sediments fill the empty skull, after which the skull is destroyed and the cast fossilized. Scientists are increasingly utilizing computerized
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