The recent and scientifically controversial announcement of arsenic-eating microbes in the eastern California desert has ratcheted up the expectation of finding life among the stars.
Another Kepler data release is scheduled for February and once again there will probably be a flurry of blogs speculating if the mission has found the interstellar Holy Grail -- an Earth-sized planet in the balmy habitable zone about a sunlike star.
A term that's often kicked around is finding an Earth-analog. But what does that really mean? Does it imply something is living there? If so, the answer is very likely to be decades away, and full of uncertainty.To read the rest of the article, click here.