Only the bony spikes remained on other fossils from armored dinosaurs. This is because keratin — the dead cells that make up structures like hair and fingernails — doesn't fossilize well.

These creatures evolved various forms of protection, including bony plates, spikes, and tail clubs to deter predators. Here’s ...

The top of a Pachycephalosaurus skull could be 9 inches (23 centimeters) thick, and much of the skull and the snout were also covered by small bony knobs and spikes. The dinosaur's distinctive ...

The dinosaur had some of the tell-tale features of the “ostrich ... It's a new species →Creature with spike-covered genitalia found 'ambushing' in Thailand. See new species →Diver spots 'large'-eyed ...

Borealopelta’s massive shoulder spikes could have acted like a bull ... it must have had some terrifying predators indeed. The terrifying dinosaur of the day, 110 million years ago, was ...

This massive footprint is believed to belong to a giant Saurolophus, a duck-billed dinosaur estimated to exceed 15 meters in length. This would make it larger than even famous predators like ...