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 ...

Researchers suggest that ground-based mammals fared better than their arboreal relatives during the end-Cretaceous extinction ...

In the Palaeogene, the continents drifted even closer to their present-day positions, and during the following Neogene Period the world was cooler and the effects of seasonality were more widely felt.

The humble iguana may have have pulled off an epic migration millions of years ago, traveling from the coast of today’s Mexico to Fiji on rafts made of vegetation.

Millions of years ago, a band of intrepid iguanas boarded a floating vessel, and reached the remote Pacific island chain.