when did the cenozoic era take place
Cenozoic Era. The Cenozoic Era began 65 million years ago with an asteroid impact that killed off a majority of the dinosaurs and ends at the present day. The Cenozoic is commonly divided into three periods: Paleogene (65.5 to 23.03 million years ago) Neogene (23.03 to 2.6 million years ago) Quaternary (2.6 million years ago to present) KT Extinction