Im talking about the great pyramids not the obelisks.....
I was talking of both. They were also clever with the use of sand, and used the controlled release of sand to move heavy objects.
As for trees, ever been to Egypt? There are plenty along the river, as there likely was then as well, and not just date palms. They didn't need to
replace every one of them, they simply needed to use a few for each stone. Also, the ramp was a gentler slope, and required less force to pull and
push the stone up...
There are other options for the way the ramp was used as well... We know they used a ramp and logs because we've seen art depicting the process.
However, what the art doesn't show, is whether or not the logs were set to rotate, and were actually stationary (my personal belief) forming a
primitive but effective conveyor belt....