The first step in the Deep Sentinel program, one of the most ambitious ocean-engineering projects in decades, will be completed this year. This initial step, called Vanguard, will shelter three aquanaut-scientists at depths of 100 meters. Eventually, the project will create a modular underwater habitat system that will let scientists live underwater for weeks at a time.
Ok but why? Why would anybody chose to live confined underwater? If you like airtight containers so much just build a bunker
Why would anyone choose to live confined in space? Idk, but the ISS still exists.