Seudónimo Seudónimo

03-12-2018
History

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How long was prehistory vs. history?
(I also don't understand the sentence as well)

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altersternsc altersternsc

03-12-2018

150k-170k years of prehistory and around 30k years of history; The question is essentially asking how long humans have existed vs. how long humans have recorded data about their existence.

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