Scientists unlocked a superconductor mystery under crushing pressure

Superconductors promise loss-free electricity, but most only work at extreme cold. Hydrogen-rich materials changed that—yet their inner workings remained hidden because they only exist under enormous pressure. Now, researchers have directly measured the superconducting state of hydrogen sulfide using a novel tunneling method, confirming how its electrons pair so efficiently. The discovery brings room-temperature superconductors a step closer to reality.