I think there are two main points Hediger wanted to be known. The most important probably is respect for animals. And the other one is that zoos are justified, scientifically justified. And this, I think, is becoming more and more important since animal rights organizations try to stop keeping dolphins and the like or polar bears and then elephants and so on. And Heini showed that this is not justified scientifically. So I think these two points are his important discoveries. A lot of things we get through the TV and the radio about zoos. In 1974, you were involved in a radio and TV programs.