Extraterrestrial life

Earth 2.0? NASA's Kepler Mission Finds New World In Habitable Zone 1,400 Light Years AwayNASA's Kepler Mission may have found our cousin with the confirmation of the first Earth-size planet in the "habitable zone" around a sun-like star.
Do Life-Erasing Stellar Gamma Ray Bursts Mean We're Alone In Our Corner Of The Cosmos?An astronomer considers a recent report that indicates advanced life may be routinely destroyed by frequent high-radiation blasts from nearby stars and makes a case that we should still keep searching the sky for signs of intelligence.
Mono Lake Microbe Raises Likelihood Of Alien LifeThe Mono Lake discovery of a strange bacteria that can use arsenic as one of its nutrients widens the scope for finding new forms of life on Earth and possibly beyond.