Katherine Freese

| Katherine Freese is the George E. Uhlenbeck Professor of Physics at the University of Michigan. She is author of a book The Cosmic Cocktail: Three Parts Dark Matter.

Martin Winkler

| Martin Winkler is a German particle physicist and cosmologist who has worked at the Deutsches Elektronen-Synchrotron, the Nordic Institute for Theoretical Physics and the University of Texas at Austin.