| 1 | Your jawbone is the hardest bone in your body. | |
| 2 | Meanwhile, the lower jaw shrunk in both length and height. | |
| 3 | Results: All animals grew well and their mandible were all lengthened at different level. | |
| 4 | Discovering the jawbone (from the bear's left mandible) was an accomplishment in itself. | |
| 5 | Leviathan mellvillei's fossil skull and jawbone were discovered in these Peruvian-desert rocks. |