New Scientist published an article titled Dinosaurs’ ‘bulletproof’ armour revealed.
Apparently the massive herbivore, ankylosaur, developed armor plating for protection from its enemies. This adaptation was necessary during the late Jurassic and Cretaceous periods, because rival species began deploying rudimentary ballistic weapons. Gun violence became a widespread social problem among dinosaur clans. Fossil evidence has revealed that, as predatory practices became more sophisticated, depleted uranium penetrators and shaped charge warheads rendered the ankylosaur’s defensive systems combat ineffective. It is believed that rapid advances in delivery systems and energy yield ultimately led to the mass extinction of ankylosaurs (and many other species), when a multi-gigaton payload was launched from long range, detonating near the Yucatan Peninsula.