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the exact same human brain that came up with the idea for space travel, for microwave emitters, for ion engines, for particle colliders, is also the same brain our ancestors had 20-30 thousand years ago.
It is the utmost in modern avarice to think that our forefathers did not have the capability to erect stonehenge, or the easter island statues, or create the pyramids of egypt. the only difference between them and us is the accumulated collective knowledge about the world around us.
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