Scientists Create Robots Smaller Than a Grain of Sand by Daniel Akst
They run on light and are the world’s smallest, fully programmable, autonomous devices. Now researchers at Penn and the University of Michigan have created the world’s smallest, fully programmable, autonomous robots, packing significant capacities into a device smaller than a grain of salt. These are parsimonious little things, barely visible to the naked eye yet able to sense their environment, respond to it and move around in complex patterns. As described in a new paper in the journal Science Robotics, they run on infinitesimally small quantities of energy and gain power from light. Tiny robots do have potential medical functions and a second area of potential use could be in manufacturing tiny devices such as computer chips with intricate circuitry. Scientists Create Robots Smaller Than a Grain of Sand – WSJ

