  In this talk I discuss several topics at the interface of particle physics
and astrophysics/cosmology. These include the problem of dark matter and two
popular dark matter candidates: axions and neutralinos. I also discuss briefly
some recent developments in electroweak baryogenesis, as well as a variety of
somewhat more exotic topics: the fate of domain walls, axinos, non-vanishing
cosmological constant, and cosmological constraints on models with dynamical
supersymmetry breaking. Most of the material is review, however a few of the
remarks, especially regarding axion cosmology in the framework of
supersymmetry, I believe to be original.
