Welcome to the forum, Nopeda. I hope you enjoy your time with us. Feel free to use the search function at the top of the page, as there are many interesting threads on this very topic. Keep an eye on the dates of the threads, though.
nopeda, on 07 March 2012 - 08:05 PM, said:
Since we can't figure out how they could have done it today, what are the chances that a bunch of different separate societies of ancient humans were able to figure out how to do it thousands of years ago?
Think very carefully about that statement.
Dozens of different societies all around the earth figured out Masonry technology. If a bunch of societies around the planet can all figure it out, the logical conclusion is that the technology is not all that complex.
You should be careful of logic that begins with the assumption of "I, personally, do not know, therefore others do not either."