About sixty-five million years ago, the dinosaurs died out, and the age of mammals began. The mammoth, which appeared about one million years ago, was one of the largest of the mammals, but it was not common to the state. A close relative, the mastodon, was, and scattered remains of it have been found in Pamlico, Pitt, Carteret, and Edgecombe Counties. Other big game animals that ranged through North Carolina were the giant beaver, the saber tooth cats, and the glyptodonts, which were some of the most bizarre creatures ever. The glyptodont had armadillo-like features, such as a solid carapace, with thick immovable plates joined at their edges. It measured twelve feet long and had rings of bony armor sheathing its long tail and ranged from California to coastal North Carolina.