The bilayer nickelate La3Ni2O7 was recently discovered to superconduct at temperatures above 80 K, when placed under large hydrostatic pressures. While these newly-discovered nickelates share some common features to the copper oxide superconductors, they also have some important differences as well, making them a natural test for ideas surrounding high-temperature superconductivity. In this talk, I will introduce this new class of superconductors, and how we are able to stabilize superconductivity in this material at ambient pressure using molecular beam epitaxy and compressive strain in epitaxial thin films to mimic the effects of pressure. I will then address a key question about the origin of superconductivity in these materials, namely the relationship between magnetic order and superconductivity, which plays a critical role in other families of high-temperature superconductors such as the cuprates and Fe-based superconductors.