Comment Aerosol formation (Score 5, Interesting) 44
I assume even with the smaller size the mechanics for formation are more or less the same as rain and snow here on earth. If so, it could be possible that microorganisms past, present, or imagined would play a part in the process at times to assist in precipitation. Of course for something to live at temps low enough to live through dry ice formation would be nothing like here on earth, but if they are capable of withstanding extreme conditions that could be a place to find them.