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Published online 8 February 2005 | Nature | doi:10.1038/news050207-5

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Mars Express goes for boom or bust

Orbiter will deploy its radar to hunt for underground water.

The radar stowed on board the European Space Agency's Mars Express orbiter will finally be unfolded in early May.

The Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) will look for traces of water ice beneath the martian surface, and could potentially detect reservoirs up to five kilometres underground.

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