Theoretical particle physics (astroparticle physics; early universe physics)
Dr Katherine (Katie) Mack is a theoretical astrophysicist at the University of Melbourne. In her research, she finds new ways to learn about the early universe and fundamental physics using astronomical observations, probing the very building blocks of nature by examining the cosmos on the largest scales. During her education and research career at Caltech, Princeton, Cambridge and Melbourne, she has been working on the interface between astronomy and particle physics, studying dark matter, black holes, cosmic strings, and the formation of the first galaxies in the Universe. Dr Mack is also an active science communicator, participating in a range of science outreach programs such as Scientists in Schools and Telescopes in Schools, as well as regularly contributing to radio programs, podcasts, and public events. Her popular writing has appeared in Sky & Telescope, Time.com, and the Economist's "Babbbage" tech blog, among others. She is active on Twitter as @AstroKatie, co-hosts a YouTube astronomy chat series called "Pint in the Sky" and blogs at "The Universe, in Theory."