Quick newbie question: is there a way to look up which technologies advance your civ to another era? That information doesn't appear on mouseover in the tech tree or in the Civilopedia. I seem to remember it being shown when you mouse over a tech among the various options presented to you when you complete a prior tech, but that means you can't plan ahead for techs you can't yet research, or check whether or not a tech will advance you after you select a tech from the prompt.