I don’t understand why so many cultures seemed to have an obsessive need to study the night sky. Once you get past figuring out solstices and equinoxes, what did they gain by putting so much time and effort into studying the stars?
I am still working on the Thread that talks about the Giant Limestone block quarried and used an a very ancient building at Baalbek....
And there seems to be evidence that the Egypt Pyramid builders had Machines and material ...that have not be understood as of yet
The Monumental Baalbek The largest building blocks on Earth
The Large Stones are 14 X 14 x 68 feet.
******************************************
And see post #11 on the thread for links regarding the Mound Builders in North America.