Whenever an edit is made or a question is answered, the post is bumped up. However there is no way to see who edited or answered the post.
The answerer (is that a word?!?) can be found out by viewing the post, but in case of edits only on opening the question on browser can we see who edited.
I request that the name of the user who answers or edits a post be displayed along with “edited x minutes ago”