This Artificial Skin Actually Bruises

A recent Medgadget article discussed a new artificial skin that bruises just like the real thing. You’re probably wondering why someone would want that, right? The answer is simple: a responsive prosthesis is more life-like, and can alert the wearer of possible damage. The skin was developed by researchers at the Chinese University of Hong Kong. It’s made with an ionic hydrogel, and shows changes in electrical signaling when it’s deformed and produces a purple hue on the surface.