Some big news from Galaxy Zoo: It's looking very much like a classic classification scheme for galaxies — first dreamed up by Edwin Hubble himself! — may be, um, wrong. The consequences of this are as dramatic as they are cosmic: It implies very strongly that the way we've been thinking about how galaxies form and maintain spiral arms is also wrong. Instead of being semi-permanent features of galaxies, they may instead actually wind themselves up, disappear, and reform again!
Wow. This is a very big deal.