The Defenders Clash of the Dinosaurs : Season 1 Episode 1
TV-PG Discovery 2h 52m
Aired: December 6th, 2009 @ 8:00 PM EST on Discovery
Predators didn't dominate the Cretaceous period - plant-eaters did. And their bodies were built to take a beating. The latest science reveals the anatomical secrets that made the earth's largest vegetarians successful.
