James May uncovers the fascinating science of engineering, giving the real 'nuts & bolts' account of how things really work, from the wheel to the Saturn V rocket. How have smart men with spanners managed to change the world? James finds out by asking things like: What did steam ever do for us? What is the smartest machine? And when can I move to Mars? Through a wonderful world of animation and motion graphics James reveals all the answers and along the way, find outs who has been building skyscrapers for millions of years, what a football has to do with nanotechnology and how a 180mph chicken gun and foul tasting tea help keep you safe on a plane.