Our children were mostly brought up and educated in the Churchill suburb east of Pittsburgh. Each summer, we took them back to England for an extended period.

Looking through the list of earlier Nobel laureates, I note a large number with whom I became acquainted and with whom I interacted during those years as they passed through Cambridge.

I was a close observer of the developments in molecular biology.

At the age of 12, I developed an intense interest in mathematics. On exposure to algebra, I was fascinated by simultaneous equations and read ahead of the class to the end of the book.

From an early age I was told that I was expected to do more than continue to run a small business. Education was important and seen as a way of moving forward.

I am delighted to have had students, friends and colleagues in so many nations and to have learned so much of what I know from them. This Nobel Award honours them all.

On my return to Pittsburgh, I resolved to go back to the fundamental problems of electronic structure that I had contemplated abstractly many years earlier.

Leaving England was a painful decision, and we still have some regrets about it. However, at that time, the research environment for theoretical chemistry was clearly better in the U.S.

I had changed from being a mathematician to a practicing scientist. I was increasingly embarassed that I could no longer follow some of the more modern branches of pure mathematics.

Life with a scientist who is often changing jobs and is frequently away at meetings and on lecture tours is not easy. Without a secure home base, I could not have made much progress.

In the war, most young men were inducted into the armed forces at the age of 17. A group of students was permitted to attend university before taking part in wartime research projects.

I enjoy jokes, smiling, and making people smile. I may be a little different, but that's OK, who wants to be normal anyway?

I'm a control freak. I'm defensive. And I'm an egomaniac. That's true about me.

One of the most important thing in families, both for children and spouses, is never to close off possibilities - particularly never to make demands or threats.

The greatest of all infidelities is the fear that the truth will be bad.

That was clearly a tackle aimed at getting revenge - or maybe it was just out-and-out retribution.

Anything that makes you feel good is always going to be drawing in more.

If you obsess about the next, you will miss what you need in the now and ultimately, sacrifice the next.

Even though the vast majority of my work was outside television, the amount of creation and inventing that went into the TV shows was non stop and, unknown to me, a great strain.

I do think there is a value in the services of judges for long periods of time.