http://planetcivilization.gamespy.com/View.php?view=Civilopedia.List&game=5

But that's the Civ3 civilopedia...

indeed it is. splendid find my boy!

That'll be useful if you need to look up something but don't have access to Civ, good work!

Though, looking again it does lack statistics like unit stats, build costs etc, so maybe it isn't that useful.

...so maybe it isn't that useful.

Just look up "Age Of Science" and you will find out. ;)