Lindzen recalls his discovery of the mechanism underlying the QBO in the semi-autobiographical review article, "On the development of the theory of the QBO". His interest in the phenomenon began in 1961 when his PhD advisor, Richard M. Goody, speculated that the 26-month relaxation time for stratospheric ozone at in the tropics might somehow be related to the 26-month period of the QBO, and suggested investigation of this idea as a thesis topic. In fact, Lindzen's, "Radiative and photochemical processes in mesospheric dynamics, Part II: Vertical propagation of long period disturbances at the equator", documented the failure of this attempt to explain the QBO.