• shalafi@lemmy.world
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    15 hours ago

    Only recently! For the past 10,000 years a 70-year span would not see a single significant change.

    (If I mix this up, someone correct me.)

    I think it was at Olduvai, or somewhere in the Great Rift Valley, that hominids spent 600,000 years hammering out the same exact stone tools.