At last scientists offer a possible explanation for urban hipsters

We've all seen the movie set-ups. Some fresh young thing gets off a bus from nowheresville and walks breathless through the Big City. They gape at the tall buildings, the fast cars, and the strange people. Look! There's a guy with three assistants all dressed in matching uniforms! There's a woman with a mohawk! Over… » 2/24/11 8:30am 2/24/11 8:30am