Science s Titan: mile-wide dunes on Earth's frozen twin intrigue scientists

Some dunes on Titan – a Saturn moon seen as a chillier version of early Earth – are huge. Scientists now have suspicions about what's going on, but they don't yet know how Titan's version of sand formed. 

U.S. / Japan ASTER Science Team / GSFC / METI / ERSDAC / JAROS / JPL-Caltech / NASA

The discovery of intriguing differences among vast fields of sand dunes on Saturn's moon Titan is opening a window on the haze-shrouded satellite's geology and climate, researchers say.

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