China’s gravity-detecting SQUID gets closer to spotting US nuclear submarines

Chinese researchers unveiled a gravity detector with world-leading precision last month, potentially expanding the military applications of the technology. It uses a superconducting quantum interference device (SQUID) to detect objects by measuring tiny changes in gravity. The team that developed the instrument says it can be used for scientific research and finding underground resources. It also brings the country one step closer to being able to spot patrolling nuclear submarines. According to...