Ankylosaurus pretty much was not afraid of anything because it would be very difficult to kill this beast. 

 

This creature’s armor protects something else as well, its eyes. The eyelids of an Ankylosaurus are made of bone. 

 

Ankylosaurus are enormous. They didn’t have legs. They didn’t need to trace after their prey, their vegetation. It wasn’t going anywhere but just there. They had these bone plates that formed its skin. And this is similar to what we see in crocodiles, armor on the back. Well, Ankylosaurus they went even further. They encase their entire backs besides their bellies, even develop these bones in their eyelids so that have armored eyelids. 

 

But a body covered in steel-like armor is only the beginning. Ankylosaurus also has a powerful offensive weapon—its tail, a club that can pummel an opponent with 90 tons of force. The top half is composed of muscle. The vertebrae on the lower half are fused together to form a solid, rod-like whip. This tail can snap more than 45 degrees in either direction. At the very end is a bony mass like a built-in sledgehammer. 

 

A giant mace that’s really well built for smashing into the heads or the legs of Tyrannosaurus and its relatives. 

 

This tail is capable of enough power to shatter the leg bones of almost any predator, no matter how big. 

 

An impact from that club could crush bone, shatter teeth. If not kill the T-Rex outright, wound it in such a way that it’s likely to starve to death. 

 

Like a wrecking ball weighing almost 45 kilograms, swinging at a speed of 78 kilometers…