![](http://static.ddmcdn.com/gif/blogs/dnews-files-2013-03-europa-epsom-salt-ocean-200x200-130306.jpg)
The discovery of magnesium sulfate salts in Europa's ice is
further evidence that suggests minerals are cycling in and out of the
sub-surface ocean.
![](http://static.ddmcdn.com/gif/blogs/dnews-files-2013-03-earth-microbes-survive-mars-200x200-130306.jpg)
Earth microbes have been found able to survive in the low pressures found on the surface of Mars.
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