I turned 65 last year, and each year I get more and more interested in human health. For most people it happens around age 50, but I've always been a slow learner. It's critical in terms of the cost of health care.

I've had a very unusual background in science - not the usual route of planning on being a scientist from age 3. I think my story shows that success is more about personal motivation and determination than it is about where you were born or what your economic status was.

In the past, geneticists have looked at so-called disease genes, but a lot of people have changes in their genes and don't get these diseases. There have to be other parts of physiology and genetics that compensate.

My early years were hardly a model of focus, discipline, and direction. No one who met me as a teenager could have imagined my going into research and making important discoveries. No one could have predicted the arc of my career.

The Bible has been through millions of rounds of exegesis and interpretation, but it hasn't been until quite recently that it's been taken as the absolute truth, to the point where people expect it to inform ideas about biology and life on this planet.

I'd love to go back to Europe in the '20s and '30s, for the beginning of the Psychoanalytic Movement, and Freud and Jung, and all that was going on with discoveries in quantum physics. The whole nature of reality was changing and being challenged.

I want to get across that science is something that we all have ownership of and we can all take an interest in. We don't all have to understand complex theories, but we should have a working knowledge, like knowing your way round the engine of your car.

There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery.