The most exciting aspect of this discovery is that pictorial evidence of flowing water in the recent past strengthens the potential for microbial life on Mars.Life sustaining water must be in the form of liquid water, not ice or water vapor, both of which are known to exist on Mars. The new findings emphasize the need for a deeper examination of the possibility of the existence of Martian life and could become one of the main goals of future Mars expeditions. Nevertheless, many questions remain, among them the nature of the light-toned deposits (frost?), whether they indicate the locations of aquifers (subsurface rocks saturated with water), and how flowing liquid water emerged in the first place; temperatures on Mars are so frigid that liquid water cannot persist for long on the surface.