Megalonyx jeffersoni, ground sloth model, Now The West Virginia State Fossil Baryonyx They were closely related to

They were closely related to insects

The imprint of the horn sheath also remains

Acrocanthosaurus (meaning "high-spine lizard" because of the spikes growing out of its spine) was a fierce predator that was roughly 30-40 feet (9-12 m) long and weighed about 5

Camarasaurus(pronounced KAM-ah-rah-SAWR-us) Camarasaurus (meaning "chamber vertebra") was a large

Megalonyx jeffersoni, ground sloth model, Now The West Virginia State Fossil Baryonyx They were closely related toPresident, Thomas Jefferson, scientifically described fossil bones given to him by saltpeter miners found in a Monroe County cave in 1797. Jefferson thought they were the claws of a giant cat. In 1799 Casper Wistar re described the bones as a new species of extinct giant ground sloth and named it in honor of President Jefferson. Only recently have the bones been Carbon 14 dated at over 38,000 year old. On March 8, 2008 Megalonyx jeffersoni became the