re: Mars is Bone Dry
Ok, look at it this way (the surface is bone dry and maybe below because it may be frozen):
1) Humidity is rising.
2) Surface soil is dry.
I'm not Nick, but something tells me that there must be something sublimating into the atmosphere from below and obviously the surface ground/s are bone dry due to solar radiation.
Why is sublimation occuring?
Nick (you're on)?