Sailing
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Requires
- 50 Science
Allows
- Allows builders to embark.
Unlocks
- Improvement: Fishing Boats
- Unit: Galley
Astrology
Requires
- 50 Science
Unlocks
- Building: Shrine
- Building: Stonehenge
- District: Holy Site
Irrigation
Requires
- 50 Science
- Pottery
Allows
- Allows clearing of marsh.
Unlocks
- Building: Hanging Gardens
- Improvement: Plantation
Writing
Requires
- 50 Science
- Pottery
Unlocks
- Building: Library
- District: Campus
Archery
Requires
- 50 Science
- Animal Husbandry
Unlocks
- Unit: Archer
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