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Earths History
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Precambrian Time
Paleozoic Era
Mesozoic Era
Cenozoic Era
Geologic Time Scale
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Earth's History
Learn about earths history, from the very beginning.
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I'm going to tell you about each period of time in Earth's history...
The Precambrian time,
The Paleozoic Era,
The Mesozoic Era,
The Cenozoic Era and,
The Geologic Time Scale.