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4 October, 08:50

Why are the four major divisions of earths history useful?

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  1. 4 October, 09:14
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    Supereon: Precambrian and "n/a" or not named yet. 2. Eon: Hadean, Archean, Proterozoic and Phanerozoic. 3. Era: Cryptic ( ... many others ...) Paleozoic, Mesozoic and Cenozoic. Human history is divided into ages; including the Neolithic, Stone, Iron, Bronze, Middle, Industrial and Digital.
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