Nano Christmas Card

Nanotechnologists at the University of Glasgow have produced what they believe to be the world's smallest Christmas card. It measures 200x290 micro-metres, whatever they are, and is etched on a tiny piece of glass. When you consider the relentless drive of miniaturisation, this isn't such a daft project as it seems. Nowadays most people have computing power in their mobile phones that would have needed a mainframe 50 or 60 years ago. Glasgow University is demonstrating that it is a leader in the field of nanotechnology.