Mars Kept a Secret for 3.5 Billion Years – NASA’s Curiosity Rover Finally Dug It Up - SciTechDaily

1. Mars Kept a Secret for 3.5 Billion Years – NASA’s Curiosity Rover Finally Dug It Up  SciTechDaily
2. Could Mars volcanoes have supported ancient life on the Red Planet? Well, maybe  Space
3. NASA digs up new clue in search for life on Mars  DW
4. Carbonates identified by the Curiosity rover indicate a carbon cycle operated on ancient Mars  Science | AAAS
5. Curiosity rover finds large carbon deposits on Mars  Phys.org

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