NOVA ferrets out long-forgotten secrets of architects and engineers of the early civilizations. Content focuses on the trebuchets of medieval Europe, the pharaoh's obelisks of ancient Egypt, the moai statues of Easter Island, the...

Students work as engineers to design and test trebuchets (in this case LEGO MINDSTORMS robots) that can launch objects. During the testing stage, they change one variable at a time to study its effect on the outcome of their designs....