As we know from medical ultrasound, sound waves can penetrate our bodies without causing harm, and they are much more energy efficient than lasers. This means that this technology could be safely used inside the body to move things around.
Certain conductive materials, when cooled below a characteristic critical temperature, will exhibit zero electrical resistance. A loop of superconducting wire can sustain an electric current indefinitely with no power source. These properties lead to enormous energy savings, and drive continuous research into finding materials that are superconducting at ever-higher temperatures. Another critical superconducting property is […]