The Last Codex
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Theme

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Lathe and screw thread: the whole path

  1. 1
    Tools & MakingI

    Stone Tools

    The first cutting edge

    3.3 Mya

  2. 2
  3. 3
    Fire & ShelterI

    Rope & Cordage

    Twisted fibres that hold the world

    46,000 years ago

  4. 4
    Materials & ChemistryII

    Pottery

    Clay turned to stone by fire

    20,000 years ago

    needs 2

  5. 5
    Materials & ChemistryII

    Charcoal

    Wood cooked slowly under earth

    c. 4,500 BCE

    needs 1, 2

  6. 6
    Materials & ChemistryIII

    Bronze

    Copper and tin, harder together

    c. 3,300 BCE

    needs 2, 4, 5

  7. 7
  8. 8
    Materials & ChemistryIII

    Iron Smelting

    Wider adoption around 1200 BCE; ore, charcoal and a bloomery

    c. 1,200 BCE

    needs 5, 6

  9. 9
    Materials & ChemistryIII

    Steel

    Iron with just enough carbon

    c. 1,000 BCE

    needs 5, 8

  10. 10
    MechanicsIII

    Gears

    Teeth that trade speed for force

    c. 350 BCE

    needs 6

  11. 11

Type a name, a date, a material, a domain…