Explore the Cenozoic era, known as the Age of Mammals, which showcases the dramatic rise and diversification of mammalian life following the dinosaurs' extinction. This era, spanning from 65 million years ago to the present, has seen significant climatic shifts and the development of modern ecosystems. Discover how mammals thrived, the evolution of flora and fauna, and the formation of major geological features like the Rocky Mountains and the Great Lakes. The Fossil Record and Evolution of Life part 4