During its first ring dive, Cassini got closer that ever to the mysterious hexagon storm at Saturn's north pole, seen here in a 2014 image from the spacecraft. | NASA/JPL-Caltech/Space Science Institute

Cassini's ‘Grand Finale’ Dives Could Show How Quickly Saturn's Rings Will Fade

New research suggests Saturn's rings may last a billion years before fading away — and Cassini's ring dives will help test the theory.

May 5, 2017
11:19 AM EDT