Cenozoic - Wikipedia
Cenozoic Era | Definition, Events, & Facts | Britannica
Cenozoic Era: Facts About Climate, Animals & Plants
Cenozoic | U.S. Geological Survey - USGS.gov
Cenozoic Era summary | Britannica
Cenozoic Era - Geology Page
The Cenozoic Era Continues Today - ThoughtCo
Cenozoic Era - Mammals, Plants, Climate | Britannica
The Cenozoic Era: From Dinosaur Extinction to Human Evolution
Cenozoic Era - Encyclopedia.com