The progress in neutrino physics over the past ten years has been tremendous: we have learned that neutrinos have non-zero mass. I will pick out one of the threads of the story-- the measurement of flavor oscillation in neutrinos produced by cosmic ray showers in the atmosphere. I will present the history, the current state of knowledge, and the remaining puzzles.
Coffee and cookies before the presentation at 3:20 pm, and refreshments after the presentation will both be served in Room 128.