An Ankylosaurus probably couldn't kill a Tyrannosaurus rex with the club at the end of its tail, but new research suggests the bony bludgeon could definitely break its ankles. To estimate just how ...

Armored, squat, and built like a tank, ankylosaurs were a type of dinosaur known for their bony, protective exterior and distinct, sledgehammer-shaped tails. Now, scientists have pieced together how ...