Quora: Why haven't we found civilizations older than 8,000 years? | Dark Hacker News

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Quora: Why haven't we found civilizations older than 8,000 years? | Dark Hacker News

Quora: Why haven't we found civilizations older than 8,000 years?(quora.com)

3 points by kellyreid 9 years ago | 0 comments

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