River of Death
- Episode aired Sep 30, 2008
- TV-PG
- 45m
Paleontologists look to modern day mass deaths to help determine what killed the herd of pachyrhinosaurus found in a fossil field in Alberta Canada.Paleontologists look to modern day mass deaths to help determine what killed the herd of pachyrhinosaurus found in a fossil field in Alberta Canada.Paleontologists look to modern day mass deaths to help determine what killed the herd of pachyrhinosaurus found in a fossil field in Alberta Canada.