I think that gravity has an effect on any particle in our universe. Even the photons are attracted by the back holes (despite the fact that some physicists consider photons as having no mass !) But in quantic physics, particles may adopt one these two behaviours: being "real objects" i.e with a mass or being a wave!
So what is the mass ? Does the mass really exist ??
Edit suggested by anonymous user. It was approved by one reviewer and I just managed to catch it and reject it.
Why are anonymous users allowed to mess up things? At least if an anonymous user does the editing the person who wrote the entry should be primarily responsible for approval or rejection.
I am asking, a feature request, for a veto from the original person who wrote the question/answer that was edited by an anonymous user, as in this case already there was an approval! It would have made the answer really stupid.
Edit in response to comment by @user36790.
Rolling back is an option that corrects things, IF the original author reads the site often. We have many good answers by very good physicists who have stopped looking in everyday or even month and some not at all. A distortion of their answers might go unnoticed and get approval by ignoramuses and destroy the integrity of the site. Moderators cannot be reading everything as postings go through first page very fast.