[LessDmesg]

There are whole different ways of life. For example, before the abundance of oxygen on Earth, the first bacteria lived on sulphur-based biochemistry. It was slow and inefficient, but better than being poisoned by that oxygen plague! Remember that it's an extremely destructive oxidizing agent (even in us it causes aging etc). It actually took millions of years for living organisms to start breathing oxygen (which was the real new and exciting breakthrough of the time).

[nobleach]

And this is why I argue when some refer to places like Saturn or Jupiter as "hostile toward life" or "Impossible living conditions". They are certainly hostile to they types of organisms with which we're familiar. But as we often find, nature has a way of surprising us.