Metal Rubber promises a more flexible future

Using nanotechnology, researchers at Virginia-based NanoSonic have devised a new materal they call Metal Rubber that can conduct electricity as well as a bar of steel and stretch to three times its length.  The technology could lead to everything from more flexible article limbs to aircraft wings with more give to bendable circuits that make your laptop or cellphone more durable.  According to the company, the substance could be used in products as early as 2006.  But there are more than a few hurdles to overcome.  Right now, it takes a day and half to make a 12-inch square piece of the material.