Next Big Future  October 9, 2018 Researchers in China are working on a device they hope will be able to reveal the location of a target as far as 500 metres below the ocean surface monitoring tiny disturbances in the Earth’s magnetic field caused by metallic objects such as submarines. They are also working on sensors using cutting-edge quantum technology to chase the gravitational abnormality that a submarine creates in a large body of water. Powerful listening devices have also been planted in strategic seabed near the American naval base in Guam and in the South China Sea, some of […]