Nearly two miles underground in South Africa, scientists have found oxygen that has never seen sunlight. In March 2026, researchers descended into the Moab Khotsong gold-and-uranium mine near Johannesburg, tapping brine that geochemical dating shows has been sealed off from the surface for at least 1.2 billion years. Their reading, 0.09 micromoles of oxygen per litre, echoes a 2023 find by the same team in ancient Alberta groundwater. https://archive.md/s2hJR
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Ada Palmer
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2026-09-10 16:05:01 UTC
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