Water on Mars?

Having been slightly obsessed by Mars ever since I read Kim Stanley Robinson's sublime Mars trilogy, this counts as big news. If it's water that cuts those gullies, then life is a possibility too. Liquid CO2 is a very good candidate for causing the erosion however, especially given the pressures and temperatures on the Martian surface.

Time for another robot!

BBC NEWS | Science/Nature | Water flowed 'recently' on Mars

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