NASA scientists are sick of being asked if the world is going to end in 2012 – so much in fact, they've published an article on their website explaining just why it's a load of rubbish. The release of Roland Emmerich's blockbuster film 2012, in which John Cusack's character Jackson Curtis has to deal with the end of the world, has only made matters worse. There are several theories as to how the world is supposed to end, most of which focus on a particular date - December 21. The best-known is that relating to the Mayan 'long-count' calendar, which...