"I think we can firmly say 'yes, there was water acting on the
surface of Mars.'"
Source: Gerhard Neukum, a European Space Agency
scientist, on spectrographic images of Mars taken by the ESA's Mars
Express. In spite of losing its lander, Beagle 2, Mars Express is
sending back revolutionary pictures of the Martian surface. Its
eventual mission: gauge just how much water remains on the Red
Planet.