The Tyrannosaurus Rex, or T-rex, lived 85 million to 65 million years ago in the era known as the Cretaceous Period. It inhabited open forests that had nearby rivers, and also coastal forested swamps. read more
And if the Triceratops began to dwindle, the T-Rex could do nothing else but follow. Magnolias outnumbered cycads 10 to 1 by the Late Cretaceous Calcareous nanoplankton, foraminifera and other plankton became extinct at the K-T boundary together with the ammonites and the mosasaurs which depended on them. read more