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Historical record · Cosmos · life · humanity

Big Bang to Us

Cross changing time scales from the expanding universe to the arrival of our species.

Primary topic: Nature & the Universe

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Scope of this guide

A curated selection of milestones, not a complete history or a claim that every step is a direct ancestor of the next. Earlier reading-path context is separate from the chapters selected for this subject.

Actual source-review status

0 completed · 1 partial · 11 pending chapter reviews in this subject.

The factual audit is unfinished. These counts come from recorded chapter reviews, not legacy “reviewed” wording, confidence labels or image checks. A completed source review retains scientific and historical uncertainty.

Key chapters

  1. c. 13.8 billion years ago

    The Big Bang →

    The universe expands and cools from a hot, dense early state.

    Full chapter source review pending. Confidence labels are editorial assessments.
  2. c. 1.8 billion years ago

    Complex cells diversify →

    Cells with internal structures establish a new branch of life.

    Selected claims checked. Full chapter review remains partial. Read the full Javaux 2025 fossil study to assess its geological age constraints, morphological/taxonomic criteria and limitations; only its actual abstract was accessible. Then reassess the whole chapter for sign-off.
  3. c. 300,000 years ago

    Homo sapiens emerge →

    Our species appears within a diverse human world.

    Full chapter source review pending. Confidence labels are editorial assessments.

Connected roads

These are authored connections in the existing catalogue, not an automatically inferred family tree.

All chapters & review records

Sources

Sources cited by the existing chapters. Listing a source does not mean every claim has been verified.