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Sep29-05, 07:47 AM
P: 8
Figure this one out?

This article suggests that the moon actually consumed one of Saturn's rings:
According to a Geophysical Research Letter submitted on the 29th of April by Paulo C.C. Freire of Arecibo Observatory, "...this ridge and the dark coating of the hemisphere on which it lies are intimately interlinked and are the result of a collision with the edge of a primordial Saturnian ring, ultimately caused by a sudden change in the orbit of Iapetus".