Oxygen produced thousands of feet below the ocean surface without light or photosynthesis
Scientists discovered that metal lumps, called polymetallic nodules, on the dark seabed produce oxygen. Dark oxygen is created without sunlight or photosynthesis, which was previously thought to be the only way oxygen is produced. The oxygen comes from electrochemical activity in the nodules, not plants. Polymetallic nodules, made of metals like manganese, iron, cobalt, nickel, copper, and lithium, split H2O molecules into hydrogen and oxygen. This discovery challenges previous understanding and opens up new avenues for studying deep ocean processes and oxygen production at extreme depths.
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