One of its most distinctive diagnostic features was its defensive apparatus: the upper tusks

The skull of S

one of the fossils preserved the three-dimensional keratinous sheath of one of these claws

The males of this species were also distinguished by their enormous horns

An interesting aspect of Camptosaurus dispar is that fossils have been found in several locations in North America

Arctodus simus Mammoth One of its most distinctiveArctodus simus , commonly known as the short faced bear, was one of the largest terrestrial carnivores of the Pleistocene of North America. This extinct member of the subfamily Tremarctinae inhabited a wide range of ecosystems, from the central plains to the northern forests of the continent, between approximately 800,000 and 11,000 years before present. Its highly specialized morphology has been the subject of intense debate surrounding its trophic