Part of the T. rex lower jaw emerges (with teeth!)

At this point, there are ten teeth visible in the jaw, but there’s a chance that they might find more as they continue to remove sandstone.

Reptiles lose and replace teeth constantly throughout their life. When they lose one tooth, another comes in behind it. Notice in the photo above that there are teeth at various heights or stages of replacement.

Overall, the T. rex fossils appear to be incredibly well preserved, much to the delight of our paleontology team. There is one large crack through the lower jaw and a tooth where the roots of modern plants pushed through the fossil causing damage, but otherwise there are only a few minor surface cracks.

Article Source: Burke Museum