Best Defense:

Ankylosaurus

Meaning of Name:	“bent; crooked lizard”
Period:	Cretaceous Period (138 million to 65 million years ago)
Size:	4 - 9 meters long
Location:	Texas, Antarctica, Utah, and Argentina

Not only is Ankylosaurus the widest of all dinosaurs, but it's the most heavily armored, with bony plates, studs, and spikes lining its entire back-even its eyelids have spikes. In addition, its tail has a thick knob of bone at the end of it, believed to have been used as a very formidable club against its enemies.

First Discovered:

Dinosaur Hall of Fame