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Re:The Modern Mind May Be 100k Years Old (2016) by distances on Tuesday January 07, 2020 @03:35PM (#21984502)
/r/AskHistorians has a several topics on this theme (if it's possible there are older civilizations we don't know about). The consensus is that it's very unlikely.

E.g. https://old.reddit.com/r/AskHistorians/comments/b5yrmi/how_c...

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