Cornell researchers in physics and engineering have created the smallest walking robot yet. Its mission: to be tiny enough to interact with waves of visible light and still move independently, so that it can maneuver to specific locations—in a tissue sample, for instance—to take images and measure forces at the scale of some of the body’s smallest structures.Cornell researchers in physics and engineering have created the smallest walking robot yet. Its mission: to be tiny enough to interact with waves of visible light and still move independently, so that it can maneuver to specific locations—in a tissue sample, for instance—to take images and measure forces at the scale of some of the body’s smallest structures.[#item_full_content]