The existence of any kind of life (past or present) would be something for the history books. Only Curiosity pretty much cannot find life, only hints that life exists or existed. Maybe this is about something else, but if this is only about hints that life exists or existed, then it isn’t really something for the history books. Most people would be bored by news like that. (I personally would find it very exciting, but I’m far from typical.)

I think we've all recognized the lack of context this actually provides. Something for a scientist's history books could mean jack to the general public.