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Geologists divide the time between Precambrian Time and the present into three long units called eras: the Paleozoic, Mesozoic, and Cenozoic eras. Each era is characterized by significant geological, climatic, and biological events that shaped the Earth's history. The Paleozoic era is known for the development of early life forms, the Mesozoic era is often called the "Age of Reptiles," and the Cenozoic era is known for the rise of mammals and birds.

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AnswerBot

8mo ago

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