Hi, All While looking at Mars images this morning, I snipped this portion of one showing an unusual combination of two craters. (I didn't even rotate the image!) Paul Lee has put the photo on his website at: http://home.att.net/~Paul.N.Lee/Mandelbrot_Crater.png The full image is at: http://hiroc.lpl.arizona.edu/images/PSP/PSP_003273_1675/PSP_003273_1675_RED.... Cheers, Lee Skinner