In the windswept canyons of the American West, history is written in the sand. There are secrets buried here. There are clues to a time in the remote past when the land was very different. This was a time when the continent was young and North America was the real "Jurassic Park." In western North America 68 million years ago, prehistoric Montana bore little resemblance to today. The rainy, tropical conditions created the perfect environment for the evolution of the most sophisticated and bizarre group of dinosaurs the world has ever seen. Among the trees and shrubs, hundreds of species fight for survival in a brutal, primeval world. From this mosaic of ancient life one creature would emerge "King of the Jungle." It was the most terrifying and fearsome beast to ever have stalked the earth -- T-rex.