What was The Cenozoic was a time of .?

The Cenozoic era, spanning from about 66 million years ago to the present, is often referred to as the "Age of Mammals" due to the significant evolution and diversification of mammals following the extinction of the dinosaurs. This era also saw the rise of birds and flowering plants, along with major geological changes that shaped the Earth's climate and landscapes. It is characterized by the development of modern ecosystems and the emergence of humans in the late stages. The Cenozoic is divided into three periods: the Paleogene, Neogene, and Quaternary.