Martian Atmosphere found to be Supersaturated with Water
Such a discovery fits well with catastrophic Martian geology. A temporarily raise in the pressure of the Martian atmosphere by dust from impacts and volcanic activity that would allow surface water. When Martian atmospheric pressure dropped as this dust settled the resulting evaporation would supersaturated atmosphere. This state would continue because the low pressure makes rain impossible such that the only way to reduce it is for the water to slowly bleed off into space. This further suggests that this
event happened relatively recently since the water has not entirely bled off.