The final results of the MACRO experiment on atmospheric
neutrino oscillations are presented and discussed. The data concern
different event topologies with average neutrino energies of 4 and 50 GeV.
Use was made of Multiple Coulomb Scattering to estimate the neutrino
energies of the higher energy sample. The angular distributions, the
absolute fluxes and the L/E distributions favour numu-->nutau oscillations
with maximal mixing and $\Delta m^2=0.0025 eV^2$.
Results are presented on the searchs for astrophysical sources of high
energy muon neutrinos, for bursts of low energy electron antineutrinos from
stellar gravitational collapses, and indirect searches fo dark matter WIMPs
from the Earth and from the Sun.