Its final feature, inaugurated in late 2016, is a new ship lift, a hydraulic seesaw that raises and lowers vessels as many as 371 feet to traverse the dam. Archimedes’ notion was simple ...

Legend has it that he discovered this principle while in the bath ... 214 B.C., Archimedes invented "engines of war" to defend the city, including cranes to drop rocks, claws to lift ships ...