The creatingSPARKS festival celebrates creativity at the frontiers of the sciences and the arts. creatingSparks is brought to you by the British Association, Imperial College, The Natural History Museum, the Royal Albert Hall, the Royal College of Art, the Royal College of Music, the Royal Geographical Society, the Science Museum and the Victoria and Albert Museum. Where did it all begin? Is there anybody out there? These questions fascinate scientists, writers and the rest of us alike. Editor-in-chief of New Scientist, Alun Anderson, talks to Astronomer Royal, Sir Martin Rees, and broadcaster and writer Heather Couper, about cosmology, space science, and the art of communication.