The Ancient Greeks may have invented an intricate pulley system of ropes and levers to lift vast blocks weighing up to 900 lbs when building their enormous structures. In the sixth century BC, the ...

Introduction Before the industrial age people largely had to rely on muscle power to move and lift heavy objects. Simple machines such as pulleys, levers and ramps made it easier for humans to lift ...

Some have described it as ingenious, others have said it's downright stupid. Either way, there's no arguing that this novel way of lifting cement material up a building site is far quicker than the ...