Gerard Escaich Folch, a science journalist, speaks with Jan Nogué, a quantum engineer at Qilimanjaro Quantum Tech. They dive into the wonders of MareNostrum 5, Spain's leading supercomputer, which processes unimaginable amounts of data in mere hours. The conversation highlights the striking differences between supercomputers and standard devices, as well as the exciting, yet risky future of quantum computing—focusing on qubits and their implications for cybersecurity. They also explore Barcelona's pivotal role in this technological evolution.