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  "path": "/research-spotlights/navigating-the-past-with-ancient-stone-compass-needles",
  "publishedAt": "2026-04-16T13:09:11.000Z",
  "site": "https://eos.org",
  "tags": [
    "Research Spotlights",
    "Earth science",
    "Journal of Geophysical Research: Solid Earth",
    "magnetic fields & magnetism",
    "microscopy",
    "paleomagnetism"
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  "textContent": "Quantum diamond microscopes like this one are used to map magnetic fields at the submillimeter to submicrometer scale. Credit: Ualisson Bellon",
  "title": "Navigating the Past with Ancient Stone Compass Needles"
}