Okay wait here's the description: After half a billion tweets were analysed, it has been noted how moods tend to rise and fall across the world. Based on the tweets sociologists and analysts have detected a pattern: positive feelings in the morning and evening, with dropping moods while users are at work. Many, however, would say that Twitter users can't simply represent humanity, but only a small part of it. All that's left is to figure out why user's moods change the way they do, and how to change that.