{
  "id": 8065517,
  "title": "What ancient Mars rocks reveal about its buried carbonate stores",
  "url": "https://urgent.news/2026/09/17/what-ancient-mars-rocks-reveal-about-its-buried-carbonate-stores",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-17T17:00:17.000Z",
  "source": {
    "name": "Phys.org",
    "slug": "phys-org",
    "url": "https://phys.org/news/2026-09-ancient-mars-reveal-carbonate.html"
  },
  "original_language": "en",
  "account": null,
  "summary": "Carbonate minerals are among the best records of past liquid water on Mars: They form when water carrying dissolved carbon dioxide reacts with rock, and their composition reflects the chemistry of both. Yet Mars has surprisingly little carbonate on its surface compared with what climate models predict, given that the planet likely had a (at least transiently) thick, CO2-rich atmosphere more than…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}