Samir Mathur is a physicist who has spent over two decades working on the black hole information paradox. He has proposed that this paradox is resolved because the structure of black holes is radically altered in string theory: Instead of having all their mass at their center, black holes are “fuzzballs” with no regular horizon or singularity. Mathur is now applying these new insights to understanding the singularity at the origin of the Universe—the Big Bang. His background is in string theory, general relativity, and astrophysics. Samir Mathur obtained his Ph.D. at the Tata Institute in Bombay, held postdoctoral appointments at the Tata Institute and Harvard, was a junior faculty at MIT, and is now a professor at Ohio State.