Atmospheric neutrinos in MACRO

Results from MACRO on atmospheric neutrinos are presented. For high energy events, [E-v] similar to 100 GeV, a fit to the total measured flux and angular distributions yield a poor fit without the inclusion of neutrino oscillations. The data favors nu (mu) --> nu (tau) oscillations with large mixing angle and Deltam(2) similar to 2.5x10(-3) eV(2) and disfavors a sterile neutrino hypothesis at the similar to 2 a level. Low energy events, both stopping and internal, have also been analyzed. In MACRO, statistics are poorer for this type of event. The results for Infernal Upward, and Internal Downward + Upwardgoing Stopping events also have a deficit with respect to expectation (no oscillations), but there is no observed zenith angle distortion. Detailed fits to the low energy data are also in agreement with the hypothesis of nu (mu) --> nu (tau) oscillations with large mixing angle and 10(-3) < <Delta>m(2) < 2x10(-2) eV(2) The fit with no oscillations has a probability of less than 3%. Overall, a consistent scenario arises from both high and low energy MACRO atmospheric neutrino events.