Cenozoic Era

The Cenozoic Era (pronunciation: /ˌsiːnəˈzoʊɪk, ˌsɛ-/; also Cænozoic, Caenozoic or Cainozoic pronunciation: /ˌkaɪnəˈzoʊɪk, ˌkeɪ-/; meaning "new life", from Greek καινός kainos "new", and ζωή zoe "life") is the current and most recent of the three Phanerozoic geological eras, following the Mesozoic Era and covering the period from 66 million years ago to present day.

The Cenozoic is also known as the Age of Mammals and the Age of Birds, because of the large mammals and birds that dominated, such as Entelodont, Paraceratherium, Gastornis and Basilosaurus. The extinction of many large diapsid groups such as non-avian dinosaurs, Plesiosauria and Pterosauria allowed the mammals and birds to greatly diversify and be the predominant fauna, even to the present day.

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