Why do cities exist and how will they grow and change? As more than half of the world’s population now lives in cities it is becoming increasingly important for urban designers and planners to seek answers to these questions. This article by Laura Bliss from City Lab presents the “science of cities,” and the ways in which the urban-planning world is moving away from traditional methods of simply putting cities into categories, in favor of a more evolutionary theory. Benefiting from the vast amounts of data available today on statistics such as crime and voting patterns across cities, researchers have worked to establish the quantifiable characteristics of urban areas as a whole, and recent studies in this area reveal how the shapes of cities themselves could be connected to internal economic and social processes. Learn more about these radical developments in the full article from City Lab.