I find Saturn's moon Titan most earth-like, in that it has liquids, forming rivers and lakes - "geological" features missing from most (all?) other local planets and moons http://en.wikipedia.org/wiki/Lakes_of_Titan; also http://www.world-science.net/othernews/120723_titan.htm; and geological analysis (video) http://www.space.com/16674-rivers-on-saturn-s-moon-titan-puz...