The Feather Revolution:
It is now known that feathers were far more prevailing traits of dinosaurs than previously thought. In part one, viewers meet two distinct species of Deinocheirus and Troodon. Despite ferocious arms with huge sharp claws, Deinocheirus was a plant-eater residing in the Mongolian plateau 66 million years ago. Meanwhile, the Troodon lived in the Arctic where researchers thought dinosaurs never inhabited. Through their remarkable stories and the latest scientific research, viewers learn surprising new facts about the world of dinosaurs.
The World of Sea Monsters:
When powerful dinosaurs roamed the land, one conspicuous marine reptile dominated the oceans: Mosasaurus. Recent discoveries shed light on the mysterious sea environments of that age. Part two follows a huge-bodied Mosasaurus female and the unlikely story of her earliest land ancestor. 100 million years ago, Protomosasaurus was an obscure, small reptile living on land until she was found safety in the sea. There, her descendants took a miraculous leap and millions of years later, Mosasaurus ruled the sea just as Tyrannosaurus ruled the land. For the first time, the remarkable story of Mosasaurus unveils the most successful marine creature in the age of dinosaurs.