Ankylosaurus was a heavily armored dinosaur that roamed North America around 68 to 66 million years ago, during the late Cretaceous period. Growing up to 30 feet long and weighing around 4 tons, this plant-eater had thick, bony plates along its back, providing strong protection from predators like Tyrannosaurus rex. One of its most striking features was the large club at the end of its tail, which it could swing with force to defend itself. This powerful tail could break the bones of attackers,