For forty years, the science of superconductivity rested on a quiet certainty: that cuprate crystals were uniform all the way through, their atomic order as consistent as a well-kept promise. Researchers at the University of Warwick have now looked deeper than anyone before, and found instead a patchwork — regions of differing structure, separated by boundaries far wider and more consequential than theory ever imagined. The discovery does not diminish the field so much as it restores its complexity, reminding us that nature rarely conforms to the elegant simplifications we build around it.