Superconducting materials enable technologies that would otherwise be unfeasible or impossible, such as medical Magnetic Resonance Image scanners, magnetic confinement in the ITER fusion reactor, and the magnets directing charged particles at the CERN accelerators. The materials class with the best current prospects for superconducting applications are the cuprates, which hold the record for highest ambient pressure transition temperature (Tc)-about 150 K. Those materials also host one of the greatest enigma of modern physics: the pseudogap phase. Determining the nature and origin of this mysterious phase is key to understand the mechanism of high-Tc superconductivity.