Dr. Katie Mack is a theoretical astrophysicist exploring a range of questions in cosmology, the study of the universe from beginning to end. She currently holds the position of Assistant Professor of Physics at North Carolina State University, where she is also a member of the Leadership in Public Science Cluster. Throughout her career she has studied dark matter, the early universe, galaxy formation, black holes, cosmic strings, and the ultimate fate of the cosmos. Alongside her academic research, she is an internationally recognized writer and communicator. She has been published in a number of popular outlets such as Scientific American, Slate, Sky & Telescope, and Cosmos Magazine, where she is a columnist, and she has recently been named a TED2020 Fellow. You can find her on Twitter as @AstroKatie.