Scientific advance retreated?

[smeggo]

I had the last German city surrounded and blasted them down to one defender. They wouldn't cough up either their last 4,000 gold or the couple of scientific advances I craved in exchange for peace.
Space Flight was two turns away from being researched until I took over the city then it went out to three turns. Any explanation?

 

[genghis_khev]

Germany, I'm guessing had space flight. When you wiped them out the total number of Civs that knew that science decreased. As this is a factor in reseach (or civs you know who have it i think it is) your time needed went up.

I think this is The case.

 

[hIdDeN_eViL]

german only had one undefended (well almost) city, but wouldn't give you anything?
what the hell?
normally a capture half the cities, and AI is willing to give me most of the other cities just for peace!!

 

[Tharak]

Nah - I've noticed this as well - In my current game, I had beaten Russia down to one city (Emperor level game, I'm the Dutch). I was way ahead in score and power, but they wouldn't give me anything - in fact all of the AI refure to trade Fascism, Communism and Ironclads - for any price, despite the fact that ALL other AI civs (8 now) have them - can't figure this out for the life of me.

 

[punkbass2000]

It mostly comes down to the fact that IA techs are damn expensive, as they need to be with rails and factories and double speed workers all coming online. Also there are a lot of techs around there that the AI will virtually refuse to trade unless another IA tech is on the table, and even then it may still be insulted.