Recently discovered in Montana by a husband and wife paleontological team, Tatankacephalus cooneyorum was a plant-eating beast built like a tank, able to take almost whatever punishment came at it and keep going.

From LiveScience:

It's time for some fun edumacation. In this documentary narrated by Donald Sutherland, we take a look at the dinosaurs of lower Argentina and why this arid region is perfect for making huge paleontological discoveries. May be stuff you already know, but learning never gets old, right? This was originally an IMAX film in 3D, but it really doesn't work on a small Hulu screen, so just go with it and pay attention. There might be a test.