Following the discovery of liquid water gushing over the slopes of Mars this week, the world went Mars Mad_ Again. However news of water on Mars is Hardly a new discovery. We have known for some time now that locked within Mars there is frozen water and that in some point in the planets history it had rivers, lakes and seas. However liquid water on a global scale on modern Mars is one of the most exiting discoveries yet.

On Earth, all life as we know it uses liquid water in it’s metabolism in some way. Where there is water, there is life. But is this true for all planets?

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