Various circumstances, mainly to do with my military service, prevented me from doing a Ph.D., and I have often regretted it, though you do need to choose the 'right' supervisor in the 'right' discipline - no easy task when you are totally inexperienced.

My grandmother was fond of painting and playing the piano. She had been given lessons by Emmanuel Chabrier, who used to spend the summer months in nearby Membrolle.

My motto is more, 'If you want to find something new, look for something new!' There is a certain amount of risk in this attitude, as even the slightest failure tends to be resounding, but you are so happy when you succeed that it is worth taking the risk.

I used to spend my holidays there in my grandparents' large family house, with my numerous cousins. When I die, I am going to be buried in the village cemetery.

Far too many scientists, including my good friend Richard Dawkins, present science as the truth and present it as factually correct. And actually, of course, that clearly isn't true.

As for the forces, electromagnetism and gravity we experience in everyday life. But the weak and strong forces are beyond our ordinary experience. So in physics, lots of the basic building blocks take 20th- or perhaps 21st-century equipment to explore.

Becoming a scientist is a long journey, and at every step, I found projects that were exciting, motivating me to continue. My path was not straightforward - when I began studying physics in college, I had no idea I would end up studying asteroids; in fact, I never took an astronomy class.

The medicines of today are based upon thousands of years of knowledge accumulated from folklore, serendipity and scientific discovery. The new medicines of tomorrow will be based on the discoveries that are being made now, arising from basic research in laboratories around the world.