Kristina writes "Combining computer simulations with data about the way starlight shines through Saturn's rings suggests the individual grains are big and thus could have been around a good 4 billion years, not the mere 10 million to 100 million previously suspected. What may have thrown earlier observations off is the chance that the grains aren't evenly distributed, but clump here and spread out there. In full disclosure, the person submitting this story works at the magazine posting it, and thinks people will most enjoy reading this version of the story." Link to Original Source
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