3 min read At the dawn of the Paleogene—the beginning of the Cenozoic era—dinosaurs, pterosaurs, and giant marine reptiles were conspicuously absent from the face of the Earth. Rodent-size ...

Generally speaking, paleobotanists assume that any plant fossils dating from the beginning of the Cenozoic 65 million years ago must be related to plants that are alive today, and Othniophyton ...

Daily and seasonal variations in temperature, annual cycles of precipitation, and larger swings in climate shape adaptations of plants and animals ... H.H. Biology of early Cenozoic primates.