{
  "$type": "site.standard.document",
  "bskyPostRef": {
    "cid": "bafyreibuqr37ct5hjaxz4xozynwodg6cq4tfu7fd7lnivkgwo2wuvobzsu",
    "uri": "at://did:plc:2gbt2dlwaqovtnmxkat3tyke/app.bsky.feed.post/3mg57ysohg522"
  },
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreig25akt4awz5pj2se7ffjwwnszrben5px4pd2og4ptgitsm6czthq"
    },
    "mimeType": "image/jpeg",
    "size": 76644
  },
  "path": "/articles/d41586-026-00628-3",
  "publishedAt": "2026-03-03T07:17:04.303Z",
  "site": "https://www.nature.com",
  "tags": [
    "doi:10.1038/d41586-026-00628-3"
  ],
  "textContent": "Nature, Published online: 02 March 2026; doi:10.1038/d41586-026-00628-3\n\nThe planet's crust could already have been churning 3.3 billion years ago.",
  "title": "Earth's oldest crystals suggest an early start for plate tectonics",
  "updatedAt": "2026-03-02T00:00:00.000Z"
}