Imagine the vast expanse of the world's oceans. Now, picture an underwater realm three times that size, not across the globe's surface, but tucked away deep beneath it, at a depth of 700 kilometers. This isn't the plot of a sci-fi novel but the startling discovery made by a team of scientists, unraveling the mysteries of our planet's water origins.

Unveiling Earth's Hidden Hydrosphere

The quest to pinpoint the origins of Earth's water has led researchers to a monumental find—a colossal ocean ensconced within the Earth's mantle, over 700 kilometers below the surface. This hidden ocean, concealed within a blue rock known as ringwoodite, challenges our understanding of where Earth's water came from. The size of this subterranean sea is so vast that it triples the volume of all the planet's surface oceans combined.