 from the molecular to the large networks underlying higher cognitive processes, and from milliseconds to years).To achieve this goal, the HBP relies on the collaboration of scientists from diverse disciplines, including neuroscience, philosophy and computer science, to take advantage of the loop of experimental data, modelling theories and simulations.The idea is that empirical results are used to develop theories, which then foster modelling and simulations which result in predictions that are in turn verified by empirical results.