Today’s invention is a browser plugin which remembers what content a user has scrolled through before and, if asked to display it again, does so with the content greyed out. The more showings, the paler the content.
This would alert the user, before starting to re-read any such material, to the fact that this was old news -without having to filter and completely reformat the stories on eg the BBC website, only some of which change in the course of a day.
It would also lessen the frustration associated with coming across content repeated on different sites dressed up in alternative colours, formats and fonts.