But we can understand the Universe." - Stephen Hawking
I do some work on Wikipedia when I have some free time which is very rare these days. Mostly I do quick fixes (for instance interwiki links). I have done edits on most subjects, but lately mostly about Physics. I'm also active on Wikipedia Commons. I try to stay out of controversial topics since I simply don't have the time and energy to get involved in editing fights, but it has happened that I occasionally have fixed some blatantly POV articles, but I rarely stay to see if my edit is kept or instantly reverted. I hate those people who have become Wikipedia moderators to protect their business interests and thus actively indulge in hiding the correct information.