NASA - Messenger Reveals Mercury's Geological History

NASA - Messenger Reveals Mercury's Geological History:

"NASA’s MESSENGER spacecraft’s closest approach to Mercury on January 14, 2008, acquired this image as part of a mosaic that covers much of the sunlit portion of a hemisphere not view by previous spacecraft. Images such as this can be read in terms of a sequence of geological events and provide insight into the relative timing of processes that have acted on Mercury's surface in the past. ..."

There are some pretty awesome images coming back from the Messenger probe of the planet Mercury.