Deep hotspots on ancient Mars looked habitable

[![Color HiRISE image of the central peak of Leighton Crater showing inter-layered carbonate (light colored) and chlorite (dark colored) units. These rocks suggest that inter-layered carbonate and clay sediments have been metamorphosed at depth due to hydrothermal conditions. ][1]][2]An ancient meteor strike on Mars has revealed the first direct evidence of how warm liquid water may have shaped a habitable underground environment.

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