The humble iguana may have have pulled off an epic migration millions of years ago, traveling from the coast of today’s ...

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 ...

However, the Cretaceous–Paleogene extinction event was not the ... During this dramatic period of climate change about 252 million years ago, about 80 to 90 percent of all species on Earth ...