The cyborg’s leg is a sea slug’s mouth. The robot, built from printed parts and organic material, moves on land like a sea turtle. There is no feeling to the partially organic machine. An external electrical field provides stimulation, and the robot moves. Created by researchers at Case Western Reserve University, the robot is a pioneer of sorts, an early foray into a kind of biomechanical creature, hopefully one with a longer functional lifespan than purely electric machines.