The two Chinese labs working on replicating LK-99 appear to have found a room-temperature superconductor at ambient pressure.

Here's what's different from last time:

• it's more like "room temperature" than room temperature, the paper says 250K which is -23 C.
• it has already replicated, with two separate labs in China confirming the results.
• The chemical difference appears to be that this thing has sulphur where LK-99 did not.