Science, the esteemed global magazine of cutting-edge research, has an unlikely cover star this week. Banksy’s Bethnal Green flower adorns the hallowed page with the following explanation: An example of "art" by self-styled guerrilla artist Banksy, as seen in East London in November 2007. Human behavior that would be characterized as antisocial punishment can also be called art; prosocial institutions, most notably the campaign Keep Britain Tidy, refer to Banksy's work as vandalism. Odd......