finding alien Earths

In his cosmic log blog, Alan Boyle has an interview with Alan Boss of the Carnegie Institution regarding what could be viewed as a cohmpetition between the European Corot satellite and the soon-to-be launched Kepler mission to find Earth-sized planets. Very interesting. When we finally find an Earth-sized planet in orbit around a sun-like star in an orbit that could potentially be the equivalent of the habitable zone in which Earth orbits... that will be one of the biggest discoveries in human history.