The tooth-marked bones of giant, plant-eating dinosaurs have provided a fascinating glimpse into the prehistoric feeding ...

That was the case for a team of scientists in Thailand who only needed 22 bones to realize they had discovered an entirely new species of carnivore ... a pair of new herbivore dinosaurs before ...

While many of the most dangerous dinosaurs were carnivores, a few dinosaurs, like Ankylosaurus, were herbivorous but still extremely dangerous. So what exactly made the herbivore Ankylosaurus deadly?