Dark matter. It surrounds us and penetrates us; it binds the galaxy together. But what it is it really? Are we sure it exists at all? Can it really be explained by tiny invisible particles? I'll get you up to date on what we know so far about dark matter, how we're searching for it, and how it differs from the other big cosmic mystery of the day, dark energy. There will be time for questions at the end, so bring your own!

Dr Katherine (Katie) Mack is a theoretical astrophysicist. Her work focuses on finding new ways to learn about the early universe and fundamental physics using astronomical observations, probing the building blocks of nature by examining the cosmos on the largest scales. Throughout her career as a researcher at Caltech, Princeton, Cambridge, and now Melbourne University, she has studied dark matter, black holes, cosmic strings, and the formation of the first galaxies in the Universe. Katie is also an active science communicator and is passionate about science outreach. As a science writer, she has been published by Slate, Sky & Telescope, Time.com, and other popular publications, and has been a columnist for Cosmos Magazine. Further information about Dr Mack can be found at: http://www.astrokatie.com/

ACT AIP Women in Physics 2017 Lecture