It’s raining planets. Members of the science team for NASA’s Kepler telescope have just announced the tentative discovery of more than 1,200 worlds orbiting distant stars. Of these, approximately four dozen are candidates for being Earth’s doppelgangers — planets that could be layered by a liquid ocean and a thick atmosphere. Worlds that might conceivably host life.
Within a thousand light-years of Earth there are at least 30,000 of these habitable worlds.
Well, perhaps they’re only habitable, and not inhabited.