Scientists have discovered that polymetallic nodules—rock formations found across the deep ocean floor—can generate oxygen through a surprising chemical process. Without needing sunlight, these nodules produce tiny electric currents that split water molecules into hydrogen and oxygen, essentially mimicking electrolysis in complete darkness. This process, known as "dark oxygen" production, reveals that life in the ocean’s abyss might not rely solely on surface-driven photosynthesis. It also raises exciting prospects for finding life on oceanic exoplanets like Europa or Enceladus, where sunlight can’t reach but minerals and water might interact in similar ways. #DeepSeaDiscovery #DarkOxygen #OceanScience #Astrobiology #DeepOceanRocks