Scientists who have been studying Mars and the atmosphere there believe that there's a possibility of huge water reserves. They believe that the rate of atmospheric escape, 20 grams per second of oxygen and CO2 to space, doesn't account for most of the atmosphere that Mars is thought to have once held.

Recent evidence seems to show that water flows on Mars still from time to time, leading the team to believe that Mars might very well hold huge reservoirs of water close below the surface. While Dr. David Brain(yes, that's really his name...), believes that extrapolating the current rate out over time ignores the possibility of variable rates that may have taken more of the atmosphere and water out into space, he also thinks that some of the ancient water and CO2 is still stored in hidden reservoirs.

Of course, the possibility of water on Mars not only points toward the possibilities of life currently on Mars, it also means that putting people on Mars would be much easier in the not too distant future. Mars missions under development are sure to be on the lookout for proof of these hidden reservoirs.