games-pc sid s meiers-civilization iii User Manual

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Future Technology
After your scientists discover the last of the named advances, they can begin research-
ing futuristic advances. These not-yet-imagined civilization advances are collectively
known as “Future Technology.”When your civilization accumulates enough scientific
research to finish one unit of Future Technology, you can research another. Each Future
Technology you discover adds to your final score (see “Scoring” in Chapter 14:Win-
ning the Game
for other ways to boost your final total).
Special Advance Effects
A number of the advances have effects independent of the new units and improvements
you can build.We summarize these effects here. Each advance’s Civilopedia entry also
lists all of its effects.
A n c i e n t   A d v a n c e s
Construction:
Workers can build Fortresses.
Iron Working:
The strategic resource Iron appears on the World Map.
Mapmaking:
You gain the ability to trade maps.
The Wheel:
The strategic resource Horses appears on the World Map.
Writing:
Allows you to establish Embassies, sign right of passage agreements and mil-
itary alliances, and trade communications with other civilizations.
M i d d l e   A g e s   A d v a n c e s
Astronomy:
Allows trade to take place over Sea squares.
Engineering:
Workers can plant forests. Knowledge of bridge building causes move-
ment bonuses to apply when crossing a river on a road.
Gunpowder:
The strategic resource Saltpeter appears on the World Map.
Magnetism:
Allows trade over Ocean squares.
Navigation:
Allows trade over Ocean squares.
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