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10 inventions to master first, in an order where each one only needs those before it.
Light, heat and cooked food
Twisted fibres that hold the world
Clay turned to stone by fire
needs 1
Draw, settle, filter, boil
needs 1, 2, 3
Fat and ash against germs
needs 1, 3
Melted sand you can see through
needs 3
Separating liquids by boiling and condensing
Lenses that extend a working life
needs 6
A world too small to see
needs 8
Stopping the spread of germs
needs 4, 5, 7, 9
Surgery without pain or awareness
Goal · needs 6, 10
Type a name, a date, a material, a domain…