From a gravity-powered light for the developing world to cabaret nights for scientists, green gap years, coffee bio-power and more of the best bright ideas
Mary Hamilton: Mentally ill people are told to seek help, when in reality that help is often unavailable. What we get are front pages that make our illnesses worse
With millions of viewers - and millions of pounds changing hands - online beauty tutorials are one of Britain’s fastest-growing businesses. But for the young people involved it is about far more than just make-up. Eva Wiseman meets the vloggers