Mega Machines: Sea Giants S02E12 - World's Greatest Submarines

New submarine technology has pushed the boundaries of ocean exploration, and behind-the-scenes access reveals the cutting-edge technology and design that help world-class scientists explore our planet's final frontier. Explorers from marine research company OceanX use the latest science and filmmaking tech to spotlight the deep sea's darkest secrets. OceanX contracted with Triton Submarines to build the deep-sea submersibles Neptune and Nadir.