Indonesia’s PT PAL begins building stealth submarines with France’s Naval Group, boosting local capacity for advanced conventional subs. Indonesia has signed a roughly $2 billion deal to produce two Scorpène Evolved submarines, a move designed to boost...

modules at a depth of 10 meters (approximately 32 feet) in the South China Sea, scientists have managed to charge lithium-ion batteries using light that has traveled through the water column. Engineering Solar Cells for the Depths The primary challenge...