How an Evolutionary Arms Race Created Bizarre Dino Designs

It’s attack vs defense on an epic evolutionary scale. Utahraptor was the largest raptor to ever walk the Earth, honing its weapons and tactics to become a truly apex predator. And top of Utahraptors’ dinner wish list was Gastonia. But Gastonia were the spikiest dinosaurs to ever lived, covered in thick armor and developing their own deadly weapons with which to fight back.