Today, quarrymen cut and carve granite using saws with diamond-edged blades and steel chisels.
But ancient Egyptian quarrymen and stonemasons didn't have these modern tools. How, then, did they quarry and cut such clean lines in their obelisks and other monumental statuary?
In its trip to Egypt in March 1999, NOVA brought along ancient-tools expert Denys Stocks to help explore this mystery.