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Originally posted by RuneSpider
reply to post by ButterCookie
Technological, not so much. They could have, and accounts from the Egyptians state they were, built by the people of the time.
As for the math... the mathematics of it are pretty simple, basic geometry is involved in making a pyramid shape.
Originally posted by RoyalCanadian
If alien traveler wanted to construct landmarks large enough that they could be seen from the air the best way would be to have the locals do the work for you.