There was. The critical moment for me was in the 11th grade. My biology teacher, Mr. McKenzie, decided that what our school needed was a theater arts program and we didn’t have it. There was wrestling, basketball, football, it was a very jock oriented school and there was no theater program whatsoever. So we started a theater program from scratch. We bootstrapped it. He taught it, and I think he might have done it for nothing. We had to build the props and the scenery and the costumes and do everything ourselves. We had to turn the stage into a proper working stage. It took a year, but we started putting on our own productions. I think that was really a pivotal moment. My biology teacher was our muse at that time. And I think the fact that we were having to do everything, that it wasn’t handed to us, may have created a kind of a work ethic that paid off then in independent film production because it’s the same thing. You know, you’re finding scraps and bits and pieces, and putting it all together and putting on a show. And it’s that sense of being able to create some moment of glory, some showmanship — out of nothing, out of baling wire — that is maybe a lesson that was learned there as a result of this man who just decided to have a theater arts program.

One in particular, Mrs. Gordon. I hated her. I took AP English. The AP courses were just starting in the ’50s. And you could take a maximum of two. I took Chemistry and AP English. Today, the kids come into Duke, they have ten, 12, 15 AP courses. They start taking AP courses in their first year of high school. It’s absolutely amazing. Mrs. Gordon taught AP English. And she took a disliking to me for some reason early on, and she didn’t like the way I wrote, so she gave me very bad grades on all my essays. She pounded into me about how to write clear, effective, succinct English. And I learned those lessons well. But what I remember — and I pay her a tremendous tribute for that because there’s no more important skill, certainly for a scientist, but really for almost any profession, than to be able to express yourself clearly and succinctly. And I think she really taught me that.

I can’t remember that anyone in particular did. I think perhaps it was my mother who influenced me the most. She was a housewife. She had no higher education, but had the most common sense of anyone I knew, and she wanted me to have a career. So she was always very supportive, at a time when many women of her generation would not have been.

I did have — definitely — one heroic figure who impressed me very much indeed, and that was the great Antarctic explorer, Shackleton. Shackleton I always admired because he was a tough man and a very good leader. And whenever he was in difficult circumstances, which he frequently was, he seemed to have the great ability to inspire his men and lead his party safely out of those conditions. So certainly Shackleton, I would have said, more than anything, was a role model for me.

I can be cranky,

I'm making cheap electricity,

I invented optical levitation.

I didn’t realise I’m the oldest ever! So I just about made it, huh? Because you can’t be dead and win … If you’re a winner of the National Inventors Hall of Fame you can be dead. I won that prize a couple of years ago and I was very proud of that. That is the most, I would say, most important prize I’ve won.

Wonder Why would say, 'Why is the sky blue?'…Then Wonder Why would tell you. I was fascinated, because I wanted to know how things worked ... that was my introduction to science.

I invented optical levitation.