Dr. Katie Mack is a theoretical astrophysicist, exploring a range of questions in cosmology, the study of the universe from beginning to end. She is currently an assistant professor of physics at North Carolina State University, where she is also a member of the Leadership in Public Science Cluster. She has been published in a number of popular publications, such as Scientific American, Slate, Sky & Telescope, Time, and Cosmos magazine, where she is a columnist. She can be found on Twitter as @AstroKatie.