No, I wasn’t an advisor. And during my Frankfurt time, I followed the tradition of Grzimek, who gave lectures at the University of Giessen and that is about 100 kilometers to the northeast of Frankfurt. But I didn’t feel that this is my work and that I can do it. I just thought that was not my field. If a professor needed help, I of course would advise him, but I never did it myself. You’ve traveled all around the world. You’ve seen many, many zoos, both in Europe and in the United States and elsewhere.
