Raising the Megalithic Roof.(ancient engineering techniques)

SHOW ME A FIRM PLACE to stand and I'll move the Earth', Archimedes extolled the power of levers in the fourth century BC. Yet when modern engineers try to use his principles to shift heavy loads without resorting to mechanical aids, they often fail. Television programmes on the attempts to shift megaliths or erect standing stones often reveal more perspiration than inspiration.

No direct evidence exists on how such stones were handled, but the fact that remarkable -- and often vast -- building work was done has remained a challenge to many archaeologists and engineers. Cliff ...

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