The Mars Express orbiter recently completed an extensive survey of the giant Valley Marineris system, and has found strong evidence that glaciers once filled some of its valleys. The report also includes notes about the upcoming deployment of (and the dangers involved in) the Mars Advanced Radar for Subsurface and Ionosphere Sounding, or MARSIS, an instrument that should be able to find evidence of water even if it's very deep under the surface of the planet. Finally, there is also a brief discussion of developments regarding the failed Beagle probe team's efforts at launching a follow-up mission.

The article includes several tres-cool pictures of various parts of the Marineris complex.