I feel articles like this give off "alien mist have built the pyramids" energy. We've always been smart, but what modern civilizations have is systematic recording, organization & dispersal of gained knowledge with amazing efficiency. I think a great example of great ingenuity lost is roman concrete, recipe for which was only recreated recently.
Can anyone tell me the academic benefit of studying ancient building techniques that confirm modern day methods? Should we not look for unknown/unfamiliar techniques that might have been lost to time?