Is it true that some of the improvments you can build on tiles within a colony have effect on all of your colonies, in effect throughout your civilization? I'm asking about things like Tir Qan training, Xinathium hull plating, and Hyperion Drive (not sure of spelling). Do these apply to all of your soldiers and ships, or do they only apply to the ships and soldiers produced within the same colony?
If some improvements apply to all of your soldiers, ships and colonies, not just the one where the improvemnt was built, and others, such as Basic Farming and Factory, do not, is there a way to find out which ones are universal improvements?
Also, are these things only allowed to be produced once, by one civilization, in the game? I notice that when some civilization built the Restaurant of Eternal Something, the new flash said no other one could be built.
Thanks for your your replies.