After a long day of shooting portraits for a corporate client in Mayfair last week I had to go to the Science Museum for an evening event and shoot a video with my own equipment (which is an unusual occurrence).  The museum was closed to the public so on the way out I had the chance to look at some of the exhibits on my own, with none of the house lights on.  This is a piece of Moon rock which is kept in a nitrogen-filled container so that it never comes into contact with the Earth's atmosphere.  Well, not for a while anyway.