^The same way you move anything: Leverage, torque and the appropriate application of force.
I'm sure if aliens did visit, they would have had better things to do with their time than move rocks around for the crazy bald ape people.
I can't see how you can lift a 80 tonnes rock with a wooden leverage with out it breaking in to peaces.
We are talking about simple wood here, right?
Legion, i am just trying to understand. If you have some knowledge on how they did it, i would very much like to read about it as well.
Multiple levers, digging pits under it, earthen banks and ramps, A-frames, greased logs, leather and sinew, and lots of guys spreading the load at the same time...
Remember that wood has give, and compressability, which, when used correctly, means it won't break if you've set it all up right.
But if you really think it needs alien technology to move multi-ton stones... You'd be wrong. Here's one guy doing it with sticks and stones. He's not an alien.
Now, imagine there's a couple of hundred guys on the building site...