Extreme

When we talk about life, we think that it shall include oxygen, specific temperatures and other conditions that would allow the known living beings on Earth to live and thrive. Obviously we are thinking inside a box here. Fortunately a few new discoveries have shown that life can exist in completely different conditions which would be deadly for the known forms of lives. Even in the search for habitable planets, in order to define the habitable zone around a sun we put water as a pre-requisite. However, a few years ago some scientific papers and data gathered by Cassini Spacecraft have shown that methane based life forms may exist on Titan and they consume hydrogen instead of oxygen like we