I'd missed science and what it was all about because I was too busy trying to think of other things, when I was at school. I was too busy trying to be James Dean.

People think of science like somehow that's the answer, and that it's all about right answers, but science is a lens that we look at the world through.

I've always been a bit of a dreamer. I've always loved to look and seek, and explore and find out.

In my lifetime, the population of the world has doubled.

I wasn't naturally a scientist, but I was always fascinated by how the world worked and why things were the way they were.

Statistically, 2012 was the safest year to travel on a plane, in the history of aviation. Not one major passenger plane crashed. It's pretty amazing. And when you see them being taken apart and you see the work that goes into keeping those things in the air, you think, "Wow!"

The thing I loved, particularly, was the mystery of science and the idea that science doesn't know all the answers, but it is a process of finding out. It's not like science will give you the right answer and science knows everything. I love the mysteries of it.