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.)

SPOILER WARNING

There's life everywhere... we just haven't found it yet.

re: Only Curiosity pretty much cannot find life

What? A martian running in front of the camera would work. A rover not sent by earth. A little house on the... sand. Big ol skeleton of a unicorn... Seriously, you have no imagination.

It cannot find any kind of life we can realistically expect to find (given past data).

You hurt me. Don’t be so mean.

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.