Very true! After thinking about it some after posying, I did consider the Moon having no atmosphere. That would certainly explain the lack of liquid water, unlike our planet... Even if both were exposed to the same things over time. Even with the super cold temperatures, even the ice would evaporate away if exposed to the Sun. I read somewhere awhile back that in shadowy areas on the Moon, lots of ice could still be there. Those areas could be a time capsule of sorts, dating back to the formation of our Solar System. Would be awesome if we could get some core samples from those areas. We could probably learn a LOT from them.