>Experts are arguing about whether these overeager galaxies reveal something fundamental, and overlooked, in current theories of the early universe.

This is most exciting to me so far. How did galaxies form so early? Makes you wonder if space-time and the arrow of time were operating under a slightly different set of rules very early in the universe, and if that's so, the "age" of the universe might be totally arbitrary. Or maybe it's something else, who knows? Exciting stuff.