Articles related to extraterrestrial life

Cover Story: Extreme Photosynthesis: How Life on Earth Could Survive on Mars by: Elmars Krausz The discovery of a new form of photosynthesis extends the limits where life can survive on Earth, and might provide a first step to terraforming Mars.	Browse: The Aliens Are Already Extinct
Feature: Life Beneath Mars by: Mandy Thoo The continual discovery of water on other planets raises the hope that now is our time to find life beyond Earth.	Expert Opinion: Liquid water on Mars by: AusSMC Salty streaks identified by an orbiting spacecraft could be the first solid evidence of liquid water - a key ingredient for life as we know it - on Mars.
Out of this World: The Search for Alien Polluters by: David Reneke Astronomers search for alien air pollution, and Earth-based lasers could zap space junk.	Out of this World: Regional Processes Led to Huge Martian Floods by: David Reneke Regional processes led to huge Martian floods, and interstellar seeds could have created oases of life throughout the universe.
Out of this World: Most Earth-Like Worlds Are Unborn Astronomers have peered behind the Milky Way and determined that 92% of habitable planets have not yet been born.	Out of this World: Bringing the Building Blocks of Life Down to Earth by: David Reneke Astronomers find more evidence for how life began in Earth, and send a greeting to a red dwarf with two habitable planets.