The effort to move all those stones ANY distance must have been monumental (no pun intended) which begs the question: WHY? Why would a primitive culture spend so much energy when it took so much time and energy just to survive. (or were they as primitive as archaeologists believe?)
Why is there NO evidence of HOW they moved those stone monoliths?
Astronomers all talk about life throughout the galaxy... intelligent life some of which could be millions of years advanced than our own. They also talk about ways to quickly traverse the cosmos through wormholes. Yet so many are so quick to dismiss the Ancient Alien guys, yet they have no answers themselves.
These kings of artifacts, including Puma Punku stone blocks and the megalithic stones of OLLANTAYTAMBO, and the huge stonework and vitrified ruins of Peru. These sites and objects fascinate and boggle the mind. The how and why go beyond a simple explanation.
JMHO
Yeah, all that amazing technology, and they crossed the galaxy to move some very rough-hewn stones. Makes sense. /sarc.