  In this talk I discuss some recent developments in physics beyond the
Standard Model. After some initial comments on neutrino masses, I discuss the
status of low-energy supersymmetry and finally turn to describing some recent
work in theories with extra spatial dimensions. Plenary talk at the XIX
International Symposium on Lepton and Photon Interactions at High Energies,
Stanford University, 9-14 August 1999.
