And it happened that with our, so to speak, accidental discovery of the complex mating ritual of the Surinam toad, that I got into studying the behavior of those creatures, the reproductive behavior. But at the same time, because of the interest of people at the University of Chicago, I got into studying the social behavior of the wolves that had been installed in a new, fairly ample enclosure, at least ample enclosure for that time in the zoo business. So this was the early 60s. And so it was the professor and students from the University of Chicago, including such people as Devra Kleiman when she was an undergrad, but she came along to watch the wolves, especially in the mating season, and so on and so forth. And Devra Kleiman, as I’m sure you’re well aware, and probably have had others site, became really an outstanding person in relation to animal behavior in general, but also in terms of the simple, shall we say, biological features of the mammals in zoo collections. And Devra just died this summer. And on the occasion of the third edition of the volume on the mammals that the University of Chicago has published. So at the time, at the time, Mark, I did not have a general conception, but animal behavior was clearly something where there could be major contributions, especially in terms of the diversity of creatures that one had available and had available around the clock, which was an advantage, say, over trying to observe them in the field where your chances, especially with many, many species, your chances of continuous observation are simply not there.
