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Old December 26th, 2017, 11:33 PM
Asher Kelman Asher Kelman is offline
OPF Owner/Editor-in-Chief
Join Date: Apr 2006
Posts: 35,161


It's so fascinating that the entire span of history of this great invention spans such a short time. By contrast, our original systems of tooling flints lasted hundreds of thousands of years of stable technology!

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