3D-printed robotic hand powered by water can play Super Mario Bros

A 3D-printed robotic hand controlled by pressurised water can complete the first level of classic computer game Super Mario Bros in less than 90 seconds. Ryan Sochol and his team at the University of Maryland were able to 3D print the hand in a single operation using a machine that can deposit hard plastic, a rubber-like polymer and a water-soluble "sacrificial" material.