The Los Alamos Neutron Science Center is home to one of the brightest sources of ultracold neutrons (UCN) in the world. Currently, major experimental efforts are ongoing to determine the lifetime and angular correlations in neutron decay and precisely test our understanding of the electroweak interaction, and a new search for an electric dipole moment in the neutron could shed light on the observed matter-antimatter asymmetry in the universe. While UCN have long been used to perform these precise studies of the fundamental laws of nature, an exciting new capability is now being developed which represents the first true practical application of UCN. The AShES experiment uses UCN to control the distance of fission events from the material surface, enabling a new set of studies of surface damage and sputtering caused by fission fragments, which would be an important new tool for the mission of Science-Based Stockpile Stewardship. This seminar will introduce you to the unique properties of ultracold neutrons and highlight some recent accomplishments in the growing experimental program at Los Alamos.