In a global first, scientists working in the Clarion-Clipperton Zone in the North Pacific Ocean have found that metallic nodules on the seafloor produce their own oxygen, dubbed "dark oxygen."

Discovery of 'dark oxygen' from deep-sea metal lumps could trigger rethink of origins of life

Source: space
Source Link: https://www.space.com/deep-sea-dark-oxygen-from-metal-lumps-evidence-for-origins-of-life