Okay, here's my next question (and thanks to all who've enlightened me in the past). Say you're researching Medicine and you're about halfway there, and then for some reason you decide to switch paths and go for Industrialization instead. (Maybe another civ got to Medicine first and you can afford to trade, or you decide that factories are more important than hospitals -- I dunno.) Anyway, do you loose all the beakers that you put into Medicine and have to start over with Industrialization, or is there some carryover to the new tech? This could have a lot of strategic implications. Thanks!