---
{
  "id": "ASD-GUIDE-EN-RESEARCH-TIMELINE",
  "path": "/en/research/timeline",
  "title": "Research Timeline",
  "title_en": "Research Timeline",
  "category": "Research navigation",
  "summary": "Inspect published ledger updates, affected sources and equation links without inventing a discovery chronology.",
  "template": "document",
  "version": "1.0",
  "updated": "2026-09-28",
  "canonical": false,
  "source_tier": "website-guide",
  "theory_status": "FOUNDATION",
  "evidence_status": "DOCUMENT",
  "locale": "en",
  "translation_path": "/research/timeline",
  "depends_on": [],
  "related": [
    "/en/ai/knowledge-base",
    "/research/research-ledger",
    "/en/overview/learning-paths"
  ],
  "open_problems": [],
  "equations": [],
  "sources": [
    {
      "label": "Existing website content and Research Ledger; editorial reading navigation",
      "kind": "website-content"
    }
  ],
  "translation_of": "/research/timeline",
  "translation_version": "1.0"
}
---

The timeline is generated from the existing Research Ledger. Each date is the record’s `updated` metadata, not the date a physical discovery was made, a manuscript was first written, or a page was deployed. A record whose URL contains an earlier date may have been updated later; the displayed date follows its metadata.

## Read a change in context

Open a record to inspect what it replaced, what changed and which documents or equations it lists. The timeline preserves the record’s own version and its explicit statement about theoretical change. A ledger release is not experimental validation, and a new website knowledge snapshot does not raise every theory module to a new version.

<ResearchTimeline locale="en" />

## Scope of this history

This view lists published ledger entries only. It is not a complete history of ASD research or private discussions. Some early records have no English counterpart; they are linked and explicitly labeled as Chinese sources. Filters use the record’s affected paths, so a cross-module change can appear under several areas.

For the currently published source scope, consult the [knowledge manifest](/en/ai/knowledge-base). For the scientific content of any change, return to the linked original article and its source record.