"the Cenozoic era"

The Cenozoic era is the most recent of the three geological eras in the Earth's history. It runs from 65.5 million years ago to the present day. The dinosaurs had died out by this stage to be replaced by, among other species, the mammoth and the sabre-toothed tiger.


Sabre-toothed tiger
Creative Commons AttributionSabre-toothed tiger - Credit: Jim Linwood