The robot, equipped with a solar panel -- like energy harvester and four wheels, is about the size of a penny, weighs as much as a raisin and can move about the length of a bus in an hour on a cloudy ...

Cell-sized robots can sense temperature, make decisions, and move autonomously using nanowatts of power—no external control ...

The newest frontier in robotics is almost invisible to the naked eye. Researchers have built a robot smaller than a grain of ...