| A perspective view obtained by the HRSC on board ESA's Mars Express, showing an unusual 'rock glacier' in the eastern Hellas region. Ice-rich material seems to have flowed from a small, 9 km wide crater into a larger 16 km wide crater below. The ice may have precipitated from the atmosphere a few millions years ago. Credits: ESA/DLR/FU Berlin (G. Neukum) |
