Dr Joseph Cotter takes some uncommon items of bags on his journeys on the London underground. They embody a chrome steel vacuum chamber, a number of …
Source : https://www.theguardian.com/science/article/2024/jun/15/london-underground-quantum-compass-gps-subatomic-instrument-locations
'It's the perfect place': London Underground hosts tests for 'quantum compass' that could replace GPS
