Studies of the horns, spikes, plates and clubs of dinosaurs could help settle a long-standing debate over their function ...

Only the bony spikes remained on other fossils from armored ... "These animals were not wearing plate armor; they were wearing a bulletproof vest over plate armor," Habib said.

The study shows that the armor of this Cretaceous-period herbivore ... This armored dinosaur was covered with bony plates and spikes, overlaid with a thick layer of keratin—the material that ...