BS: OK. The other question I want to ask is about the shows and the planetarium. You talked about different phases of development of a project. You have a phase of research. I was wondering how you go about that research and where you get your information from.
ER: Right- a lot of it comes from - knowledge that you've gained by going around different centres, seeing different people present, contacts that you have, in different places. I'm also very lucky to - because I'm here and have been on the MSc, then every time the MSc's come in, I, have quite a bit to do with them and, I get to know them quite well so when they move off to their different centres I have a key contact in each of the centres which, can be very useful. But a lot of it will come from the fact, that you've seen something, somewhere. So then you try and research it. Or you might have even heard of something without seeing it and it's kind of filed away in, in your mind. A lot of it is done by books. There are there are books written on classical physics demonstrations and you can look those up and see if any of those will fit to - fit your subject. Often it'll be changed because it's not exactly what you want to talk about. The Internet is a wonderful resource. But you have to be careful with the Internet because there's a lot of rubbish on the Internet as well as lot of good stuff. So you have to be able to verify it and make sure it comes from a reputable source.
So it tends to come from things that you've seen, experts in the field. For example with When Lightning Strikes, because it's about electricity, um we had ( ) who used to work for the royal institutio - in London, and he now, does shows on electricity as a free lance ( ) to schools. And he came and spoke to us and - that was very useful, having somebody with specialist knowledge, of, not just - I guess a scientist who works on electricity but having his background and his knowledge of being a research scientist, but the practical side of, him actually going out into schools and presenting it to the public and, knowing which demonstrations work. So that was, particularly useful. But also books and the Internet.