Space.com is carrying this article detailing new discoveries relating to Saturn's rings. By using data from the Cassini space probe, scientists have discovered evidence that suggests the rings were created as the result of the breakup of a large icy moon about 100 million years ago.

Not addressed in the article is whether or not the rings might ever disappear one day. Considering, if the theory is correct anyway, they've been around so long already, it probably won't be any time soon.