Two years is an awfully long time.  Really, it is!  Do you remember what you were doing two years ago today?  Normally I would struggle answering that question myself, but on this occasion I know exactly what I was doing.  Two years ago today I was sitting in a cottage in the Lake District preparing to give a Key Note lecture entitled 'Climate Change Through the Eyes of a Polar Explorer' at the King Abdullah University of Science and Technology in Saudi Arabia.