For example, with distances, I think nowadays every zoo biologist know what is an individual distance or what is a flight distance. We have to work with these distances in everyday zoo work. But probably less than 10% knows that these distances were discovered by Heini Hediger. And I think that’s a tribute to Heini that his findings are now so important and commonplace that nobody remember who discovered them. You mentioned the circus, that Heini Hediger had good relationship and discovered things because of the circus.
