Randall is currently a professor at Harvard University in Cambridge, Massachusetts, focusing on particle physics and cosmology. She stays current through her research into the nature of matter's most basic elements, and the forces that govern these most basic elements. Randall's experiences, which qualify her as an authority on the subject of the book, are her original "contributions in a wide variety of physics studies, including cosmological inflation, supersymmetry, grand unified theories, and aspects of string theory ". "As of last autumn, she was the most cited theoretical physicist in the world during the previous five years." In addition her most recent work involved extra dimensions.