LK-99 hasn’t turned out to be the miraculous superconductor some people initially claimed it was. The newly discovered material made headlines after a research team claimed it was the first room-temperature superconductor, which could revolutionize our energy system. Speculation that it could bring on a perfect power grid or easily make trains levitate sparked a frenzy to test whether LK-99 really was as game-changing as portrayed by the original team. But the results so far indicate that LK-99 is not a superconductor, at room temperature or otherwise. A slew of research groups have released studies that counter claims originally made...