My previous short video on superconductors, shown here, was dismissive of any likely hood of a practical room temperature superconductor. So I thought I should respond to the recent news out of Kria about LK-99. This is a substance that's been around since, well, 1999, and has now claimed to show superconductivity at normal atmospheric pressure and at the temperature of a hot day in the tropics. It's also claimed to exhibit levitation from the classic Meisner effect. We should perhaps wait a few months for things to settle down, but I think we can say so far. The published curves do not show the sudden resistance change indicative of superconductivity. The lowest resistance shown in some published curves is actually higher than that of ordinary non-superconducting copper wire, and the Meisner effect in the Korean groups of video looks quite a lot like normal non-superconducting diamagnetic repulsion.