Is Mars lander standing in what was once a puddle?
IS NASA’S Mars Phoenix lander sitting in an area that once was able to harbour life? That’s the tantalising question raised by the announcement on Monday that the craft’s landing site, which is now bone dry, may have been wet in the past. Since the 1970s, spacecraft have beamed back images of deep channels and canyons on the Red Planet that suggest water used to flow there. More recently, orbiting spacecraft and NASA’s rovers have gleaned evidence from Martian rocks that water was once present. The higher Martian latitudes where Phoenix sits lack dramatic features such as gullies, however,