Mars, punctured.

Photo from Mars Reconnaissance Orbiter / NASA JPL.

Apologies if you already read Astronomy Picture of the Day (apod) or have seen this somewhere else, but I thought it was sufficiently wild to pass on. The image is from a high resolution camera on the Mars Reconnaissance Orbiter. The black spot is a spot where it sees nothing! The speculation (from the Planetary Society) is that they they are very deep holes, maybe underground caves! The interpretation I am going for is: home of the space-worm!