i was reading about how Cassini has revealed more of the Xanadu region being earth-like. along those lines they discussed in another article how Cassini has been able to discover more river canals. however, when the Hyugens probe landed, there was no evidence of rivers, although the surface texture was described as being like "creme brule." that led me to speculate that perhaps Titan has no real rivers, methane river canals nor rain in an earth-like sense. instead, i believe that because of the freezing temperatures, most of the liquids in the atmosphere freeze up and become more like a slushy that you get at 7-11. so rather than finding expected rivers or lakes of liquid, the expected lakes are really nothing more than sludge. of course, to truly verify such a theory, they'd have to throw another lander onto the satellite, but it is one possible explanation.
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