And 64 million years after dinosaurs went extinct, modern humans emerged in the Cenozoic era. The planet has seen an incredible series of changes—discover them for yourself.

In turn, the extinction of the dinosaurs and several other animal groups 65.5 million years ago defines the beginning of the Cenozoic era. We are including several pages with geologic time scale data ...

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 ...

Primates are smart, flexible, and adaptive creatures. How have they responded to changes in climate over millions of years? Climate is the major factor that determines where a species can and ...

He added, "We haven't seen that in anything modern." After the scientists were unable to match the fossil to Cenozoic-era plants, they concluded it came from an extinct plant family. Then ...

After the dinosaurs died out, mammals evolved into many different shapes and sizes as they filled the empty spaces left by the dinosaurs during the Cenozoic era. This period is also called the ...