(IMAGE) Universidad Carlos III de Madrid Caption There is an optimum size for electrical networks if what is being considered is the risk of a blackout. This is the conclusion reached by a scientific study done by researchers at Universidad Carlos III in Madrid; the study analyzes the dynamics of these complex infrastructures. Credit UC3M Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.