Courtesy NASA/Jet Propulsion Laboratory-CaltechIn photographs taken by NASA's Phoenix Mars Lander there appear to be droplets of some kind of liquid. Is it water from just below the planet's surface? Some scientists suspect that this is exactly what you see in the photograph here. Although the temperature of the area where the photographs were taken never warmed above -15 degrees Fahrenheit during the spacecraft's mission, scientists think that salts called Perchlorates may have lowered the freezing point of the water, making liquid droplets possible at this temperature. Other scientists disagree, saying that the low-resolution photographs show clumps of frost or may have been formed by heat from the spacecraft's thrusters. This article explains more about the debate. What do you think?