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Who's "we"? The people who built structures 1000 years ago are all dead (I assume). Just because some humans somewhere figured out something in the past doesn
by midoridensha 4y ago
Who's "we"? The people who built structures 1000 years ago are all dead (I assume).
Just because some humans somewhere figured out something in the past doesn't mean that humans somewhere else today know how to do it. Lots of knowledge has been lost to time.