Core Viewpoint - Recent research suggests that polymetallic nodules in the deep ocean may produce oxygen necessary for sustaining life, challenging the traditional belief that sunlight and photosynthesis are required for large-scale oxygen production [1][2] Group 1: Research Findings - The Scottish Association for Marine Science plans to use deep-sea detectors to further explore the potential existence of "dark oxygen" in the deep ocean [1] - Polymetallic nodules, found in dark environments of the Pacific and Indian Oceans, may generate oxygen through electrical currents that split seawater into hydrogen and oxygen [1] - The research indicates that this "dark oxygen" could support life forms such as microorganisms, sea cucumbers, and sea anemones at depths of several thousand meters [1] Group 2: Research Methodology - The team, led by marine ecologist Andrew Sweetman, will conduct underwater investigations in the coming months to understand the mechanisms behind the generation of oceanic "dark oxygen" [1] - New landers capable of descending to depths of 11 kilometers will be deployed to determine how these polymetallic nodules produce oxygen and to collect sediment cores and nodule samples for laboratory analysis [1] Group 3: Controversies and Industry Response - The research has sparked controversy, with deep-sea mining companies opposing it due to concerns that large-scale extraction of polymetallic nodules could harm marine ecosystems [2] - Some scientists have called for more evidence, suggesting that the oxygen observed may have been carried down by the landers from the surface rather than generated in situ [2] - Sweetman countered that the landers had expelled all air during descent and did not detect oxygen in other deep-sea deployments, emphasizing that the research aims to gather information to minimize impacts during mining operations [2]