In 2018, Justin Kropp was restoring a fire-damaged transmission circuit in Southern California when disaster struck. Grid operators had earlier shut down the 115-kilovolt circuit, but six high-voltage lines that shared the corridor were still…
Wearable health devices can track heart rate, movement, and sleep, but they only measure what happens at the surface of the body. Now, researchers in Japan have taken a different approach by turning living skin itself into a biological display…










