Dancing David
Penultimate Amazing
Because the ice is mainly hidden beneath the dust. At the "cliff" edge there has obviously been slumping which has exposed the face. Therefore it sublimates. Approximately 50m of erosion between the DI mission and the Stardust/NEXT mission. If it hadn't gone anywhere, that would be unusual.
Struggling to see what is difficult to understand about that for people who can easily reconcile comets being pieces of rock blasted off of planets by giant electric discharges, possibly at a time when we were all orbiting Saturn.
Sol88 is ignorant of snow piles, plow walls and all the joys of winter
http://www.topnewsnation.com/boston-still-has-snow-piles-and-theyre-filled-with-trash/

