THE PREHISTORIC EARTH #6) Last of the Dinosaurs: The Cretaceous Period

In the Early and Late Cretaceous periods, changing geological and ecological conditions created opportunities for the expansion of dinosaurs. These worldwide geologic and climate shifts of the Cretaceous period allowed for the evolution of Saurischian - lizard-hipped - dinosaurs and Ornithischian - bird-hipped - dinosaurs, including several families that appeared for the first time during this span. However, these same ecological changes also contributed to the eventual extinction of dinosaurs large and small. "Last of the Dinosaurs" explores the theories for what may have caused the mass extinction that ended the reign of the dinosaurs and many other terrestrial and marine creatures of the time. The non-dinosaurian reptiles of the Mesozoic era are also examined.

in The Early And Late Cretaceous Periods, Changing Geological And Ecological Conditions Created Opportunities For The Diversification And Expansion Of Dinosaurs. These Worldwide Geologic And Climate Shifts Of The Cretaceous Period Allowed For The Evolution Of Saurischian-lizard-hipped-dinosaurs And Ornithischian-bird-hipped-dinosaurs, Including Several Families That Appeared For The First Time During This Time Span. These Same Ecological Changes Also Contributed To The Eventual Extinction Of Dinosaurs Large And Small. Last Of The Dinosaurs Explores The Theories About What May Have Caused The Mass Extinction That Ended The Reign Of The Dinosaurs And Wiped Out Many Other Terrestrial And Marine Creatures. The Non-dinosaurian Reptiles Of The Mesozoic Era Are Also Examined.

Each title in this comprehensive reference series highlights fundamental principles of scientific inquiry and provides insight into dinosaurs and other fascinating prehistoric creatures, including mammals, birds, flying reptiles, ocean life, and human ancestors. Looks at the world as it was during the Cretaceous period, from 145 million to 65 million years ago, when new birds and mammals appeared, and ending with the disappearance of the dinosaurs, pterosaurs, and large marine reptiles.