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Breakthrough Study Reveals 'Dark Oxygen' in Deep Ocean

11/20/2025

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Summary

Story summary

Researchers led by Prof. Andrew Sweetman report a process called "dark oxygen" that produces oxygen in the deep ocean, challenging traditional views.
Robotic landers measured oxygen levels around polymetallic nodules for 47 hours.
The study was published in Nature Geoscience.
Sediment cover affects oxygen production and could influence deep-sea mining decisions.
The results raise questions about the evolution of complex life on Earth.

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Story summary

Researchers led by Prof. Andrew Sweetman report a process called "dark oxygen" that produces oxygen in the deep ocean, challenging traditional views.
Robotic landers measured oxygen levels around polymetallic nodules for 47 hours.
The study was published in Nature Geoscience.
Sediment cover affects oxygen production and could influence deep-sea mining decisions.
The results raise questions about the evolution of complex life on Earth.