Rings of Rhea
Many suggestions have been made for the possible origin of rings. An impact could have brought material into orbit; this could have happened as recently as 70 million years ago. A small body could have been disrupted when caught in orbit about Rhea. In either case, the debris would eventually have settled into circular equatorial orbits. Given their long-term orbital stability, however, it is possible that they survive from the formation of Rhea itself.