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Perseverance Finds Ancient Buried River Delta Beneath Mars Crater
NASA's Perseverance rover used ground-penetrating radar to detect a buried ancient river delta beneath the visible delta at Jezero Crater, suggesting Mars harbored more extensive water systems than surface observations alone revealed.
Key Takeaways
- RIMFAX ground-penetrating radar found inclined sediment layers 35 meters below the visible Jezero delta
- The buried deposit predates the surface delta, suggesting at least two distinct wet phases in Jezero's history
- Ancient river delta sediments are prime targets for entombed biosignatures if life ever existed on Mars
- Findings strengthen the case for Mars Sample Return to analyze material from these deep archival layers
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