Scientists find vast underground ocean with more water than Earth's surface
https://www.geo.tv/latest/561911-scientists-find-vast-underground-ocean-with-more-water-than-earths-surface

Scientists have recently discovered a vast ocean concealed beneath the Earth’s crust as an immense reservoir of water, stored in rock known as "ringwoodite", 400 miles below the surface.

originally posted at https://stacker.news/items/669424