the.com/ocean
Earth's biggest room, mostly unlit, mostly unvisited, and quietly running the entire planet.
Mapping gapLess than a quarter is mapped in detail
Oxygen sourceMakes over half the oxygen you breathe
Crushing depthPressure at the bottom exceeds 1,000 atmospheres
Hidden massHolds 97 percent of Earth's water
Slow giantStores most of the planet's trapped heat