It is a chilly Tuesday night and outside the Dana Cafe in London a queue of young people spills on to the pavement. A glamorous woman with a walkie-talkie and clipboard guards the bar's door and turns away anyone who is not on the guest list. The attraction is not the latest band, exclusive club or film screening, but a science lecture। Inside, Aubrey de Grey, a scientist from the Methuselah Foundation, a research group, is swigging from a bottle of Guinness as he tries to persuade a sceptical audience - which includes designers, artists and television producers - how society would benefit if we all lived forever. Clutching a glass of red wine, Alex Wilkie, a 32-year-old design lecturer, believes that science is undergoing a revolution and should not be dismissed as nerdy. 'It's an increasingly scientific society that we live in,' he said. 'Understanding what's going on in science helps put everything in context.' De Grey gives more than 30 such talks a year...