This sweat-powered electronic skin can control your robotic limbs

Scientists have developed an electronic skin that converts sweat into energy to control a robotic arm. The flexible, rubber material is stuck on a person’s skin. It then uses embedded sensors to monitor their health and the nerve signals that control their muscles — without the need for a battery. “One of the major challenges with these kinds of wearable devices is on the power side,” said the device’s creator Wei Gao, an assistant pro