Look up "Ancient Aliens debunked" on youtube. It's essentially a three-hour long feature about ancient technology and what could be done with it. Very cool.
edit: and yeah, they go into great detail when discussing ancient masonry. Basically, the ancients used sand (as an abrasive) and wooden saws to cut hard stone like granite.
edit: and yeah, they go into great detail when discussing ancient masonry. Basically, the ancients used sand (as an abrasive) and wooden saws to cut hard stone like granite.