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2. What is the Precambrian Era and what makes it significant compared to the other eras of Earth's history?

User Matt Mitchell
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The Precambrian Era was defined as the whole period of earth's history before the formation of the oldest rocks with fossils in them.

The Precambrian Era is significant related to the other eras, because in this period was predated the emerge of life in the Cambrian period.

User Malcolm Christie
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