Saturn’s icy moon Enceladus harbours a global ocean beneath its frozen surface without requiring drilling to explore. Powerful plumes erupting from south-pole fractures launch water vapour and ice grains hundreds of kilometres into space. New research shows that this process naturally separates and concentrates oceanic chemicals into individual ice particles, making biosignature detection easier for spacecraft. Furthermore, laboratory experiments demonstrate that Earth’s methane-producing microbes can survive in simulated Enceladus ocean conditions, enhancing its promise as a habitable world.

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