Thrinaxodon CAT Scan Rendering Dr. Timothy Rowe, Department of Geological Sciences MPEG movie 1 (1.3 MB) MPEG movie 2 (1.5 MB) MPEG movie 3 (1.4 MB) "[These images depict] the fossilized skull of Thrinaxodon liorhinus, a small animal which lived some 240 million years ago. The Thrinaxodon skull is quite rare, measuring approximately 1.5 inches in length and contains many anatomical features related to the development of early mammals. These 3-D images were created from tomographic (CAT) ...