Whether scientists can benefit from restricting or broadening the scope of their research still remains largely unexplored. Drawing on some large data sets on scientific production during several decades, I will characterise and quantify the  level of interdisciplinarity of individual scientists and the knowledge to which  they are exposed through their collaborators, with the main purpose of unveiling advantages and disadvantages of interdisciplinarity in modern science. I will also discuss how funding in science impacts the way in which we collaborate, and the other way around. I will then move from science to business, presenting an example of how network science can help to identify early-stage indicators of the future success of a startup or the entire innovation ecosystem of a city or a region  [arXiv:1712.07910, PNAS 112 (48), 14760 (2015) and arXiv:1904.08171 ].