1989, Moab, Utah, the remains of two new species of dinosaurs are discovered. Gastonia is covered in armor and spikes and Utahraptor is the largest member of the raptor family ever discovered. CAT Scans taken on the brain reveal new, never before known, information about these remarkable dinosaurs. Watch as experts reconstruct the lives of these ancient rivals and recreate a battle featuring power, stealth and secret weapons on an ancient battlefield over 120 million years ago.