Technicians operate a rover equipped with a quantum sensor mapping the subsurface of a parking in Reims, northeastern France on April 22, 2026. Reims is hosting a unique scientific experiment. With support from the City Hall, the French company Exail and the French Geological Survey (BRGM) are deploying a rover equipped with a quantum sensor capable of mapping the subsurface without any digging. (Photo by Sameer Al-DOUMY / AFP via Getty Images)