Cosmic Friday: Message from Machaut

I was tempted to do a image of mars for this weeks Cosmic Friday, but then, just today, some images of NASA's MESSENGER spacecraft were released from its third flyby of mercury, and there was an awesome (in the filled with awe sense) image of Machaut Crater that made me re-evaluate my decision and give this weeks honors to that oft forgotten messenger to the gods, and the closest and mysterious planet of Mercury. 

I'm very intregued to find out why the crater has these beautiful criss-crossing patters throughtout the lava flows. also I would love to see a more detailed image of the smaller shadowed crater in the center of Machaut.