Robots are getting more skilled all the time. We've told you about an electronic skin for robots that's sensitive to touch, made of a sensor network mounted on flexible plastic. We've also told you ...

When the researchers shine light on one fin, the muscles on its surface twitch in response, causing the whole fin to flap with enough force to pull the robot through water. By flashing light on one ...

In a shallow dish of water, a sliver of gel no bigger than a stick of gum flaps its way toward a blue light. The swimmer has no motor, propeller or battery. Instead, its two soft fins are coated with ...