At first, for every validation study that showed promising results, another study took the wind out of Ahab’s metaphorical sails. Finally, two weeks after its arrival, the International Center for Quantum Materials—an influential Chinese superconductor lab—confirmed that LK-99 wasn’t a superconductor at all, but instead displayed a kind of ferromagnetism.

So for now, the dream of room-temperature superconductors is on pause. But despite LK-99’s unfortunate fate, the dream has never been so tantalizing.