Chinese scientists say there could one day be a high-tech submarine that crosses the Pacific Ocean in less time than it takes to watch a movie, the South China Morning Post reports. Researchers at the Harbin Institute of Technology, in northeast China, have made dramatic improvements to a Soviet-era military technology called supercavitation that allows submersibles to travel at high speeds, the Post says. Supercavitation envelops a submerged vessel inside an air bubble to minimize friction.