A group of Chinese researchers from Sichuan University in southwest China, robot fish that “eat” microplastics could one day assist in cleaning up the world’s filthy oceans. These cuddly, 1.3-centimeter (0.5-inch) robots are already sucking up microplastics in shallow water. one of the researchers who built the robot, the team hopes to make it possible for them to gather microplastics in deeper water and offer information to analyze marine pollution in real time. “We created such a little, lightweight robot. It can be utilized in a variety of settings, such as biomedical or risky surgeries, where a small robot that...