How Armored Dinosaur Got Its Bone-Bashing Tail

Armored, squat, and built like a tank, ankylosaurs were a type of dinosaur known for their bony, protective exterior and distinct, sledgehammer-shaped tails. "Ankylosaur tail clubs are made of two parts of the body," said study lead author Victoria Arbour, a postdoctoral researcher in the Department of Biological Sciences at North Carolina State University and the North Carolina Museum of Natural Sciences. Arbour was interested in examining what part of this weapon evolved first.