When you’re a new animal keeper, that should be the, here’s this, read this. And I don’t find that people do. Heini Hediger who is called the father of zoo biology, that’s a pretty good title. It is a big title. Who wrote books, “Man and Animal in the Zoo,” “Wild Animals in Captivity”, “The Psychology and Behaviour of Animals in Zoos and Circuses,” these are fundamental building blocks of the profession. And I find that people, “What book is that?” Now, there’s a lot of others. I mean, these are not the end of, but these are some of the people who are the pioneers. I mean, the certainty, you know, gravity, gravity doesn’t change.