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Scientists Discover Massive Water Reservoir Deep Within Earth

8/29/2025

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Summary

Story summary

Scientists found a vast water reservoir in the Earth's mantle, possibly three times larger than all surface oceans.
The water is chemically bound in a mineral called ringwoodite, located 400 miles below the surface.
This discovery indicates a complex "whole-Earth water cycle," altering previous theories on Earth's water origins.
Advanced seismic imaging and lab simulations confirmed the presence of this hidden hydrosphere.
Other minerals and ancient aquifers may also play a role in Earth's internal water reserves.

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Story summary

Scientists found a vast water reservoir in the Earth's mantle, possibly three times larger than all surface oceans.
The water is chemically bound in a mineral called ringwoodite, located 400 miles below the surface.
This discovery indicates a complex "whole-Earth water cycle," altering previous theories on Earth's water origins.
Advanced seismic imaging and lab simulations confirmed the presence of this hidden hydrosphere.
Other minerals and ancient aquifers may also play a role in Earth's internal water reserves.