You searched for: “cainozoic
Caenozoic, Cainozoic, Cenozoic (adjective) (not comparable)
The most recent division of geological time: The Caenozoic Era includes the tertiary, or "Age of Mammals", and the Quaternary, or "Age of Man".

During the Cenozoic period, which was about 63 million years ago, modern continents, glaciations, and the variety of mammals, birds, and plants were created.