What just happened? China has created a deep-sea cable-cutting device capable of severing the world's most fortified underwater communication and power lines at depths of up to 4,000 meters. This technology, developed by the China Ship Scientific Research Centre and its State Key Laboratory of Deep-sea Manned Vehicles, targets armored steel, rubber, and polymer cables, which underpin 95 percent of global data transmission. The device integrates seamlessly with China's advanced crewed and uncrewed submersibles, such as the Fendouzhe and Haidou series, marking a significant leap in underwater capabilities. Initially intended for civilian applications like seabed mining and salvage operations, the...