If you've ever wondered about the most controversial topics on Wikipedia then you have that in common with Oxford University researchers. They've turned their interest into a full-blown study, analyzing millions of articles from 10 language editions of the site, the BBC reports. Rather than look at subjects updated regularly, researchers focused on articles in the midst of "edit wars" in 2010—with editors battling to change a section before it's almost immediately changed again. The Top 10 "most controversial articles" in the English-language edition: