This painting was used at the conference Darwin 09 - Trends in Complex Systems, held in Palma di Mallorca from 23rd to 27th November 2009. It was printed on T-shirts for the participants of the congress. Scientific coordination: José A. Cuesta, Universidad Carlos III, Madrid, Spain, Susanna C. Manrubia, Centro de Astrobiología (INTA-CSIC), Madrid, Spain and Alan J. McKane, University of Manchester, UK. (Details of the painting see below).