🌐EnglishEnglishDeutschFrançaisPortuguêsРусскийالعربيةفارسی한국어中文EntityQ123039513· pop 15· linked from 5 articlesdark oxygenoxygen produced in obscurityAvailable in 15 languagesFrançaisDeutsch中文РусскийPortuguêsالعربيةAfrikaansCatalanGeorgianInterlinguaKashmiriConnectionsmanganese noduleEntityCook IslandsEntityCategoriesChemistryElectrolysisGeology controversiesOceanographical terminologyOxygen