"If confirmed, the exoplanet, named Gliese 581g, would be the first Earth-like world found residing in a star's habitable zone—a region where a planet's temperature could sustain liquid water on its surface. And the planet's discoverers are optimistic about the prospects for finding life there. 'Personally, given the ubiquity and propensity of life to flourish wherever it can, I would say, my own personal feeling is that the chances of life on this planet are 100 percent,' said Steven Vogt, a professor of astronomy and astrophysics at the University of California, Santa Cruz, during a press briefing today. 'I have almost no doubt about it.'"