AI Summary

Scientists have identified the first evidence that liquid may have once moved across Pluto’s surface, based on dark markings observed on the Sputnik Planitia glacier that match patterns expected from liquid nitrogen rising through cracks from deep beneath the ice. Computer simulations indicate nitrogen can melt at the glacier’s base and ascend through small conduits, behaving like a fluid. The discovery suggests Pluto is geologically more active than its frozen exterior implies.

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