I sometimes get a lot of unread news. When trying to get through it I will always start from today and work my way back since news will still come in and it gets more irrelevant the further back I go. This means that there will be gaps of several days between new content and content i haven't had time to go through. I would like there to be some kind of visible border when I reach the end of new and come to the beginning of the backlog.

This idea could even be expanded to having some kind of visible grouping on days, weeks, months and so on for every content.