MGS Swan Song is Liquid Spurt
On seeing these images on the news last night, my first thought was that they were from shiny new toy Mars Reconnaissance Orbiter. MRO has, however, been wiling away its time taking pictures of the robot party on Mars. The images above, which span a period of four years, are the work of Mars Global Surveyor. NASA lost contact with MGS over a month ago, around the same time as its 10th anniversary. The reason the pictures are so important is that they are the first compelling evidence that liquid water still occasionally flows on Mars. There is a sad, but still slightly hopeful article about MGS at its official site, here.