[theold]

Scientists have discovered that metallic nodules on the seafloor produce their own oxygen in the dark depths of the Pacific Ocean. These polymetallic nodules, generating electricity like AA batteries, challenge the belief that only photosynthetic organisms create oxygen, potentially altering our understanding of how life began on Earth.

But this time the opposite happened -- the amount of oxygen increased. This was not supposed to happen in complete darkness where there is no photosynthesis.

https://www.france24.com/en/americas/202...fe-origins