The World Wide Web can be represented as a network whose vertices are the HTML documents, connected by the hyperlinks that point from one page to another. On a different level, our nervous system forms a large network, whose vertices are the neurons and nerve cells, which are connected by axons. Quantitative network research is thus not restricted to individual scientific disciplines, but is indeed relevant for many different academic contexts. In the CAS Research Focus "Quantitative Network Science" overseen by Francesca Biagini, scholars from the fields of mathematics, statistics, computer science, language processing, political science, economics, biology and philosophy deal with questions of network research. They start with the workshop "Computational Methods for Networks" on 9 and 10 November 2015. In January 2016 Prof. Dr. Alexander Borst (MPI of Neurobiology) and Dr. Moritz Helmstädter (MPI for Brain Research) will talk about "How Do Neuronal Circuits Operate?".