What Is the Cenozoic Era?


Quick Answer

The Cenozoic Era is the division of history beginning 65 million years ago and continuing to the present. It is the most recent of the three eras of the Phanerozoic eon and began with the extinction of the dinosaurs.

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What Is the Cenozoic Era?
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Full Answer

This era of history sometimes is called the Age of Mammals because, with the extinction of the dinosaurs, mammals became the largest animals on land. The Cenozoic Era is comprised of three periods: the Paleogene, the Neogene and the Quaternary. During the Cenozoic Era, flowering plants thrived, and the animal kingdom became more diverse, witnessing the rise of insects, birds, reptiles and fish. At the end of the Pleistocene epoch and the beginning of the Holocene epoch of the Quaternary period, Earth saw the extinction of large mammals such as the woolly mammoth and the saber-toothed cat.

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