The Network Science Institute (NetSI) at NU, founded in 2014, has emerged as a world leader in a multi-disciplinary research community in the field of network science. NetSI brings together expertise from diverse disciplines, from the physical, information, and social sciences, aiming to build and expand common methodology and theory of networks, and to apply these tools to important societal challenges. We work on discovering fundamentally new ways to measure, model, and visualize complex systems. Our research investigates the fundamental nature of networks as well as their applications in systems found in biological, social, technical, informational, and spatial structures.