The relationship between time and space is often discussed in relation to art. But recent reflections on time have started to focus on 'Deep Time' or geologic time, a concept which stretches before and after a human perception of time. Of course geologists and deep space astronomers have always been concerned with deep time, but maybe there's a renewed sense of our fragility on earth as the reality of the human impact on the earth's geological structure and ecosystem starts to sink in.