These tiny liquid robots never run out of juice as long as they have food –
Artist’s rendering of autonomous, continuous “liquid robots” in an animated GIF. When you think of a robot, images of R2-D2 or C-3PO might come to mind. But robots can serve up more than just entertainment on the big screen. In a lab, for example, robotic systems can improve safety and efficiency by performing repetitive tasks and handling harsh chemicals. But before a robot can get to work, it needs energy—typically from electricity or a battery. Yet even the most sophisticated robot can run out of juice. For many years, scientists have wanted to make a robot that can work autonomously and continuously, without electrical input.
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