Ursus americanus, black bear brain endocast Dimorphodon It lived in Late Cretaceous

It lived in Late Cretaceous times in the Patagonian region of Argentina

(Cro-Magnon) I Skull

From the Middle Cambrian of Utah

Classification of Geologic Time

fully toothed jaws and long tails

Ursus americanus, black bear brain endocast Dimorphodon It lived in Late CretaceousThis is a brain endocast of the The American black bear. 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