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Stone Age, Industrial Era, Agricultural Era, and Information Era

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Q: What is the 4 eras of Technology?
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What are the three eras of geologic time?

There are 4 eras, and they are the Hadean, Archean, Proterozoic, and Phanerozoic eras.


Why are more mental illnesses diagnosed then in earlier eras?

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eras


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Eras was created in 1976.


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