However, there can be no doubt that the technology to conduct heavy haulage over long distances existed a very long time ago. There is absolutely no evidence to suggest that the monliths of Stonehenge are made of concrete - indeed, the stone of which they are definitely made has been indentified as coming from mav's back yard, (relatively speaking, of course ) which is over a hundred miles away, I would guess.

Is there any other evidence of the knowledge of concrete technology in ancient times?