Ankylosaurs are built like tanks, and none of them more so than the mighty Ankylosaurus.

Although the unarmored belly of Ankylosaurus may seem like a weak point, its body is wide and low to the ground... ... making it very difficult to flip over, should any large theropods get any bright ideas!

It is massive - over six meters long - and has a series of bony osteoderm armor embedded in its skin like chainmail.

Paleontologists have made a persuasive argument that ankylosaurs like Ankylosaurus use their tail clubs to fight each other, not just their predators. We'd better keep an eye on their paddock to make sure they don't pick any fights.