Explore cutting-edge research on dark matter through a 24-minute lecture by Jo Bovy from the University of Toronto. Delve into simulations and detailed astrophysical tests that investigate dark matter on sub-galactic scales, gaining insights into the latest advancements in this fascinating field of astrophysics. Discover how these tests and simulations contribute to our understanding of dark matter's behavior and distribution within galaxies, potentially reshaping our comprehension of the universe's hidden components.