Matias Zaldarriaga is a professor at the Institute for Advanced Study in Princeton. He has a Ph.D. from MIT and is the recipient of a MacArthur Fellowship, the Gribov Medal from the European Physical Society, and the Helen B. Warner Prize from the American Astronomical Society. He has made many influential and creative contributions to our understanding of the early universe, particle astrophysics, and cosmology as a probe of fundamental physics. Much of his work centers on understanding the clues about the earliest moments of our universe encoded in the Cosmic Microwave Background, the faint glow of radiation generated by the Big Bang, and in the distribution of matter in the late universe. In 2018, he was elected a member of the National Academy of Sciences.