Saturn's rings are disappearing, study says (cbc.ca)

If the rings of Saturn are 'young', 100 million years old or younger (as mentioned in the article) then maybe, just maybe, there might be a relation between them and the dinosaurs' extinction 65 million years ago...

I would have been more surprised if the study concluded Saturn's rings were not disappearing. Not to be a smartass but is this really surprising? I'm not an astrophysicist but as far as I know debris in space either collects and combines, or it decays.