Reports from 2023 and 2024 analyze the controversial claims surrounding LK-99, a material initially purported to be the first room-temperature, ambient-pressure superconductor. While early demonstrations of magnetic levitation and zero resistance sparked a global frenzy, independent researchers eventually attributed these effects to Cu₂S impurities rather than true superconductivity. The fabrication process was described by engineers as nebulous and messy, leading to high failure rates and a temporary shortage of required chemical components like red phosphorous. By 2026, the scientific landscape remained divided between unverified ambient-pressure candidates and hydride systems that achieve high temperatures only under extreme, impractical press ...