Alien Life

This is pretty interesting -- scientists finding microbes "living nearly two miles below ground, dining on sulfur in a world of steaming water and radioactive rock." In other words, living in conditions that not so long ago, scientists would have said could not possibly support life. These little guys are way far away from any photosynthesis or any other sun-based energy or food supply.

Similarly, life has been found in other hostile spots, for example living thousands of feet below the surface of the sea, in water brought above boiling by underwater volcanic vents.

So why not life on Mars or Titan? Not that it will be SUV-driving TV-watching sushi-eating life.