The Gray Fossil Site in East Tennessee has discovered thousands of fossils, including an alligator, rhino’s, red panda, and mastodon. Researchers have also made first-of-their-kind discoveries, including new species of moles, turtles, and bone-crushing dogs. The fossils found at the site are unique in the U.S., and the site is the first of its kind in this part of the country. The pit reaches 140 feet into the earth, and crews expect to continue digging up fossils for years to come.