i cant keep my research above %60 between the ancient and medieval periods im usually the germans or babylonians and i go for conquest at the beginning of the game with the germans i expand nicely but my science suffers and have a very expensive military if im babylonians i expand as fast as possible but i end up with dozens of unproductive cities and science again suffers, if i do get ahead in science from goody huts i never can make enough cash of selling the research to kick start my science probobaly because im stuck in regent