Here it is in all it's rejectitude:
Soon after its orbital insertion in the Saturn system, the Cassini-Huygens probe captured some revealing shots of the moon Mimas. "Thats not a moon, thats a"... yes, you guessed it
Astrobio.net is reporting that the moon(398km in diameter) experienced an impact that nearly broke it up, leaving a crater 10km deep and and 130 km wide. The central peak in the crater is as high as Mt. Everest.