Gilbert Holder, the Brand and Monica Fortner Endowed Chair in Theoretical Astrophysics at the University of Illinois. Professor Holder received his BSc (1994) in astrophysics and MSc (1996) in physics from Queen's University in Kingston, Ontario, before obtaining his PhD in astronomy and astrophysics from the University of Chicago in 2001. After obtaining his doctorate, Professor Holder was a Keck Fellow at the Institute for Advanced Study (Princeton, New Jersey). He joined the University of Illinois at Urbana-Champaign in 2016 as a professor of Physics and of Astronomy and is a faculty affiliate at the National Center for Supercomputing Applications. He is also a senior fellow in the Cosmology and Gravity Program of the Canadian Institute for Advanced Research.There is still a lot of fundamental physics to learn from ongoing and future CMB experiments, but they now have sufficient depth that they can reasonably be thought of as mm-wave wide-area sky surveys, providing mm-wave perspectives on similar science themes traditionally done at visible wavelengths. This includes searches for interesting rare objects, like galaxy clusters and strong lenses, mapping the mass distribution with weak lensing, and tracking the time variable sky for solar system objects, stellar flares, and possible extragalactic transients.