https://www.nature.com/articles/d41586-024-02393-7

“Something is pumping out large amounts of oxygen at the bottom of the Pacific Ocean, at depths where a total lack of sunlight makes photosynthesis impossible.“

“The phenomenon was discovered in a region strewn with ancient, plum-sized formations called polymetallic nodules, which could play a part in the oxygen production by catalysing the splitting of water molecules, researchers suspect. The findings are published in Nature Geoscience¹.”

“At first, Sweetman attributed the readings to a sensor malfunction. But the phenomenon kept occurring during subsequent trips in 2021 and 2022, and was confirmed by measurements with an alternative technique. “I suddenly realized that for eight years I’d been ignoring this potentially amazing new process, 4,000 metres down on the ocean floor,” says Sweetman.”

There is still so much we do not know about, it is important that we do not make blanket statements and be too sure of anything.