The LSND experiment at Los Alamos has conducted searches for&ngr;¯&mgr;→&ngr;¯eoscillations using&ngr;¯&mgr;from&mgr;+decay at rest and for&ngr;&mgr;→&ngr;eoscillations using&ngr;&mgr;from&pgr;+decay in flight. For the&ngr;¯&mgr;→&ngr;¯esearch, a total excess of83.3±21.2±12.0events is observed withe+energy between 20 and 60 MeV, while for the&ngr;&mgr;→&ngr;esearch, a total excess of18.1±6.6±4.0events is observed withe−energy between 60 and 200 MeV. If attributed to neutrino oscillations, the most favored allowed region from a fit to the entire data sample is a band from 0.2 to 2.0 eV2. This result implies that at least one neutrino has a mass greater than 0.4 eV/c2and that neutrinos contribute more than 1&percent; to the mass of the universe. ©2000 American Institute of Physics.