My mother married again after my father's death - another Royal Air Force officer, and a very different kind of man. We went to Australia when I was eight or nine. We lived there for a couple of years, and then came back and lived in North Wales for the whole of my teenage years... I learned how to write poems quite a lot. I just had a good time reading and reading and reading. So that's where I did most of my growing up.

Symbols and emblems were everywhere. Buildings and pictures were designed to be read like books. Everything stood for something else; if you had the right dictionary, you could read Nature itself. It was hardly surprising to find philosophers using the symbolism of their time to interpret knowledge that came from a mysterious source.

My books are about killing God.

You going to be a scientist when you grow up?” That sort of question deserved a blank stare, which it got.

Tell him, we are not devils but we have friends who are.

It's only through honesty and courage that science can work at all. The Ptolemaic understanding of the solar system was undermined and corrected by the constant pressure of more and more honest reporting.

The intentions of a tool are what it does. A hammer intends to strike, a vise intends to hold fast, a lever intends to lift. They are what it is made for. But sometimes a tool may have other uses that you don't know. Sometimes in doing what you intend, you also do what the knife intends, without knowing.