revived
In 1987, a year after the breakthrough that revived high-temperature superconductivity, physicists cooled a ceramic of yttrium, barium and copper oxide to 93 kelvin and watched it levitate a magnet indefinitely — the first superconductor cold enough to run on li
In 1987, a year after the breakthrough that revived high-temperature superconductivity, physicists cooled a ceramic of yttrium, barium and copper oxide to 93 kelvin and…