Sitabhra Sinha is Professor of Theoretical Physics at the Institute of Mathematical Sciences (IMSc) at Chennai, India, and an adjunct faculty member of the National Institute of Advanced Studies, Bangalore. He received his Ph.D. from the Indian Statistical Institute, Calcutta, in 1998 and his subsequent research has focused on understanding complex systems using techniques from statistical physics and nonlinear dynamics. His current research interests include the mesoscopic organization of complex networks, computational neuroscience of the nematode *C. elegans*, modeling cardiac arrhythmia, and the application of statistical physics for understanding the emergence of universal distributions in socioeconomic phenomena, such as in the evolution of popularity.