For these plant-eating giants, survival relies on a battery of weapons and defenses as impressive on the inside as they are on the outside. A single blow from those horns could kill you.

 

Now, 65 million years, on, cutting-edge imaging technology takes us inside their minds to reveal what the world’s toughest defenders are made of.

 

America during the Cretaceous Period, stalking the landscape are some of the most ferocious predators ever to inhabit the earth. Carnivores have evolved into formidable hunters. It’s the only way they can survive in this brutal world. The prey they hunt are the most well-armed, best-protected animals in history. 

 

Herbivores of the Cretaceous are built to take on the biggest teeth and sharpest claws nature has ever produced. Ankylosaurus has armor designed like a bulletproof vest. Triceratops’ horns can pierce he skins of a Tyrannosaurus Rex. Parasaurolophus can detect a threat miles away. And a full-grown Sauroposeidon is a colossus to big to overcome.