Using data collected by NASA’s Pioneer and Voyager spacecraft, scientists have estimated that Saturn’s rings are “only” 100 million years old, a small fraction of the 4.6 billion years the Solar System has existed. It is possible that the rings come and go. They might be constantly renewed and reformed over time by internal collisions and by the addition of comets or asteroids that are captured as they pass close to Saturn. If we were to come back and visit Saturn in a billion years, the faint rings may be gone completely, and an entirely new ring system formed in their place. The E ring may be younger than the A and B rings. Scientists have speculated about how material in the E ring might come from small dust or ice particles knocked loose from Saturn’s icy moons. It is also possible that Enceladus may have water volcanoes or geysers constantly feeding the E ring with new dust-sized ice particles. Enceladus’ bright young surface and apparent episodes of surface melting are evidence of heat sources that could also generate volcanism. The Cassini spacecraft will learn more about the unusual ring system of Saturn. It is now apparent that Saturn’s rings are complex, dynamic, and constantly evolving things.