Propellers (as well as screws, fans and rotors) are used to move through a fluid. Propellers have been used as toys since ancient times, however it was Leonardo da Vinci who devised what was one of the earliest propeller driven vehicles, the "aerial-screw".[62] In 1661, Toogood & Hays adopted the screw for use as a ship propeller.[63] Since then, the propeller has been tested on many terrestrial vehicles, including the Schienenzeppelin train and numerous cars.[64] In modern times, propellers are most prevalent on watercraft and aircraft, as well as some amphibious vehicles such as hovercraft and ground-effect vehicles.