Despite doing the "well-rounded" thing, I still looked up and noticed I was suddenly about to get a culture victory. I decided to make it interesting by going full steam ahead on science progress to see if I could get the science victory before I incidentally got the culture victory without making any further effort. I ended up...4 turns short of completing the final space race project before the game's turn counter expired. I was a few hundred points in the lead at that point in terms of Score, having achieved the Future Tech and Future Civic tasks repeatedly.
Fun round, though! I grew my largest empire ever, settling on tiny distant islands and the far reaches of the frozen tundra, squeezing out every hex of land I could. I captured an enemy city for the first time (I mean, they declared war on me, not my fault my military was about 3 eras more advanced than theirs...they asked for peace after I took 1 city...). Now on up to the 4th easiest difficulty whatever that one is.