➀ Researchers at MPSD and Brookhaven National Laboratory have developed a new method to study disorder in superconductors using terahertz pulses. ➁ The technique, adapted from nuclear magnetic resonance, allows for the study of disorder up to the superconducting transition temperature. ➂ The study reveals that the disorder in superconducting transport is significantly lower than previously observed, offering new insights into cuprate superconductors.