User blog comment:CenturyKiller/Earth Like Planet Found & Any News on ME2 or 3?/@comment-217683-20100930233552/@comment-217683-20101001001149

Well, on two of the planets, they have pretty much ruled out there being life. On Gliese 581 g, the "Goldilocks" planet, we (of course) have no evidence that life does exist (as we just barely found the planet, and astronomers aren't even quite sure it's a rocky planet and not a gas giant yet), but they have concluded that if it is a rocky planet, and if there is water present (which is what the "Goldilocks zone" is all about, the possibility of water), then there is a very high chance of at least some form of life on the planet.