Paleontologists look to modern day mass deaths to help determine what killed the herd of pachyrhinosaurus found in a fossil field in Alberta Canada.
Did You Know?
Pachyrhinosaurus is shown having a large horn on its snout. This is an idea based on an outdated concept -- palaeontologists agree that the large, flat bony lump on its nose didn't carry such a horn. It should have a thick, flat surface on its head. See more