Hydrothermal Vents: An Ecosystem Without Sunlight

Far below sunlight, seawater enters cracks in the ocean crust, is heated by rock and magma, and returns carrying dissolved chemicals. Around that flow, microbes build food without photosynthesis and animals live through remarkable partnerships. Hydrothermal vents did not reveal an ocean detached from the Sun. Inside this episode: - The Discovery At The Galápagos Rift - A Circulation System Inside The Crust - Food Made From Chemistry - Partnerships Inside Animals Sources include peer-reviewed ocean research, official scientific institutions, and the episode's linked source record. This episode is a researched narrative summary. Historical records may be incomplete, translated differently, or interpreted differently by scholars. We distinguish documented facts, estimates, disputed interpretations, and later stories where material. Corrections are logged and incorporated into future editions. Follow Ocean Worlds for more evidence-led journeys into Earth's oceans.