U.S. scientists say they have produced the first commercially accessible material that eliminates the loss of energy as electricity moves along a wire, a breakthrough that could mean longer-lasting batteries, more-efficient power grids and improved high-speed trains.
Materials that can conduct electric currents without any loss—so-called superconductors—have been wildly impractical because they typically need to be extremely cooled, to around minus 320 degrees Fahrenheit, and subjected to extreme pressure to work.
