The Cretaceous Period was from 144 million to 65 million years ago. During this time the continents were sowly moving a part this was called the Continental Drift or Pangea . The world was covered by shallow continental oceans and inland seas. The climate during this time was warmer then it is today. The life in the Cretaceous period was evolving with many new species. Although, some of the new species were plant life and birds. There was an appearance of the first flowering plants called angiosperms. The birds that evolved during this time were pterandon and pterosaurs.There was many new species of dinosaurs in this period. Some of these dinosaurs were the Tyrannosaurs, Brachiosaurs,and Dipodocids. Towards the end of the Cretaceous period the dinosaurs started dying out and the evolution of mammals began.