If you want electronic skin or other transparent wearable devices, you need to send a current through that skin. However, it's hard to make something that's both conductive and transparent -- and that's where a team of American and Korean researchers might save they day. They've developed a nanofiber film that's 92 percent transparent, but has electrical resistance that's "at least" 10 times better than the previous best. You create it by electrospinning polyacrylonitrile (a polymer resin) until it forms a mat, spatter-coat it with metal and then electroplate it. The result is a material that eases the flow of current but is mostly made up of see-through holes.