Learn about the time period that took place 65 to 23 million years ago. 3 min read At the dawn of the Paleogene—the beginning of the Cenozoic era—dinosaurs, pterosaurs, and giant marine ...

The Cretaceous-Paleogene (K-Pg) mass extinction event, which occurred approximately 66 million years ago, is one of the most significant extinction events in Earth's history. It is widely known ...