{
  "collection": "Why Faster-Than-Light Travel and Time Machines May Be Impossible",
  "recordedAt": "2026-09-19",
  "updatedAt": "2026-09-21",
  "assets": [
    {
      "role": "Conceptual illustration: causality, spacetime, and cosmic limits",
      "archivePath": "/images/notes/faster-than-light-time-machines/originals/faster-than-light-time-machines-original.png",
      "webPath": "/images/notes/faster-than-light-time-machines/web/faster-than-light-time-machines.webp",
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      "dimensions": "1536x1024",
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      "provenance": "Supplied by Xiaodan Wu on 2026-09-19; original authorship and production method remain to be confirmed."
    },
    {
      "role": "Conceptual poster: causality, light speed, and the arrow of time",
      "archivePath": "/images/notes/faster-than-light-time-machines/originals/causality-and-the-arrow-of-time-poster-original.png",
      "webPath": "/images/notes/faster-than-light-time-machines/web/causality-and-the-arrow-of-time-poster.webp",
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  ],
  "usageNote": "This is an interpretive illustration, not a simulation, calculated spacetime geometry, or physical model of faster-than-light travel."
}