Researchers at Cornell University in the US have developed a "one-step" 3D printing method to create superconductors with record-breaking performance. The printed niobium nitride superconductor, aided by its nanoporous structure, achieved an upper critical magnetic field of 40-50 Tesla, setting a new record for this compound. This breakthrough simplifies traditionally complex processes and is expected to advance development in multiple fields, from medical imaging magnets to quantum devices.