a lot of the pyramids in central and south america were built in layers. each new king would build a new outside layer so the pyramids got larger over time. with all the burial chambers in the great pyramid it's clear that was their construction method too. what's more believable? one king had 2 million car-sized blocks cut with copper tools, or 5 kings in turn put their chamber near the top of an existing pyramid, then just heaped more stones on the outer layer?
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