Tressed to impress

摘要

"Get back upstairs and brush your hair before you go to school. You look like some kind of caveman!" Is this a familiar refrain from your youth? If so, perhaps you raged at the injustice of being born into a species with such unruly tresses, wondering why we have hair that needs so much cutting and combing to keep it in check Maybe, in those far-off, pre-Google days, you went to the library to find out more. You would have discovered that, with the exception of the musk ox, humans are the only mammals with almost continuously growing hair. You probably would have wondered why, and after a further search of the shelves you would have been frustrated to discover that nobody had an answer. How times have changed.