The dinosaur is lying on its right side, with its neck and tail curled inwards to the left. The mammal is sitting on top of it, with its teeth plunged between Psittacosaurus’ ribs.

Scientists have reassessed fossil jaw remains published by Viera and Torres in 1995 and found in 1983 in a Lower Cretaceous site at Igea (La Rioja, Spain). The remains constitute a fragment of a ...

A newly identified 8-metre-long predatory dinosaur probably waded in water waiting to ambush fish and other aquatic prey with its crocodile-like jaws and its constantly renewing, serrated teeth.

The complete skull of a previously unknown species of bird-like dinosaur has been discovered trapped in a chunk of 99-million-year-old amber. Smaller than the size of the tiniest hummingbird alive ...

Teeth like a shark's Tens of millions of years before giant tyrannosaurs such as T. rex arrived on the scene, another group of large predatory dinosaurs reigned: the allosauroids. Among these meat ...

Regardless of the underlying cause for missing teeth, if you’re looking to replace a lost tooth or make adjustments to the overall appearance of your mouth, there are different treatments available.

But dinosaur fossils are found here only rarely, so Bell says it is miraculous to have uncovered a fossilized jaw with teeth. (See photos of an opal mining community that lives underground in ...

Alejandra Gonzalez, a restorer for the National Museum of Paleontology, is pictured with a mastodon's jawbone discovered near San Salvador in 2001. More recently, a jawbone of the prehistoric ...

Developmental experiments in the 1980s showed that modern birds could probably generate teeth if their jaw tissue was artificially stimulated with the right molecules.

These serrated teeth resembled those of T. rex, the researchers wrote, indicating that the animal likely used these chompers to crunch into tendons and scrape meat from bone.

Duck-billed dinosaurs roamed the planet in the Cretaceous period some 65 to 90 million years ago in North America, Europe and Asia. What made these specimens, called hadrosaurids, so unique were ...