[freebeard]

Comes now abiotic Oxygen:

www.popularmechanics.com: 4,000 Meters Below Sea Level, Scientists Have Found the Spectacular 'Dark Oxygen'

• Scattered across an abyssal plain known as the Clarion-Clipperton Zone (CCZ) are polymetallic nodules that are a potato-sized prize for mining companies in search of materials needed for humanity's green energy transition.
• A new study analyzing these modules reveals that these rocky lumps are capable of producing “dark oxygen” 4,000 meters below sea level where light cannot reach.
• While this discovery could upend our understanding of how life started on Earth, the study also complicates negotiations around deep-sea mining regulations as it showcases how little we really know about the ocean’s depths.