Astronauts undergo rigorous underwater helicopter escape training to prepare for post-mission ocean landings and ensure ...

The ocean floor may seem a bit close to home for astronauts on a mission, but the underwater world provides a great dress rehearsal for a trek to an asteroid in deep space, two spaceflyers told NASA ...

Vanguard, a new subsea human habitat, will immerse researchers for weeks, allowing them to observe the ocean’s complexity and ...