Rob Carr writes "During the most recent Cassini fly-by, the surface-mapping radar spotted what appear to be lakes in the high northern latitudes of Titan. From the article: 'The channels have a shape that strongly implies they were carved by liquid. Some of the dark patches and connecting channels are completely black, that is, they reflect back essentially no radar signal, and hence must be extremely smooth. In some cases rims can be seen around the dark patches, suggesting deposits that might form as liquid evaporates.' At Titan's temperatures, water is a solid; the lakes would be comprised of methane and ethane. The fluids are different, as are the temperatures, but these lakes cement Titan's status in the solar system as the place with the most earth-like weather — except for Earth, of course."
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