Network Science is useful in analysing networks occurring in several walks of life and science: social, economic, biological. One can build a social network of the telecom subscribers from the “who-calls-whom” CDR data. By analysing the social network thus constructed, we can derive several useful insights from the customers’ interaction amongst themselves. The trade data among countries could give us an idea of future collaborations that might occur. The brains of several animals have been analysed for insights. In this talk, we will discuss a few varied applications of Network Science.