This is a suggestion mainly aimed at making science research more interesting and balanced. The idea is that, instead of the player choosing one tech to research for his whole empire, he can research a different tech in each city. The choice of what to research would be separate from the production choice; for example if I am Egypt, Thebes might be producing a Spearman and researching Philosophy at the same time. Of course, only a couple techs are usually available to research at any moment, so what happens if you have more cities than available techs? For this case, a city should be able to direct its science toward improving the efficiency of agriculture(food), industry or communication(culture). This is analogous to a city producing wealth or research when it doesn't have anything useful to build. There are two main benefits I see from this idea. First, it would reduce the effect that huge empires tend to race ahead in research ... as long as you have two or three big science cities, adding more cities to your empire won't substantially speed up research. Also, it would allow more customized science improvements, which add science to certain types of research. For example, a Hospital might speed up biomedical-related tech research, but not other types. What do you all think?