I theorize that there is a spectrum of consciousness available to human beings. At one end is material consciousness. At the other end is what we call 'field' consciousness, where a person is at one with the universe, perceiving the universe. Just by looking at our planet on the way back, I saw or felt a field consciousness state.

I don't think there is much value in trying to use the moon as a base to go to Mars. That's going into one gravity belt and having to get back out of it again. And the moon doesn't have a lot to offer as a resource base.

We do need different types of propulsion to get to Mars. I wrote one of the first Ph.D. theses on that in the 1960s.

At the end of October 4 in 1957, when I was coming back from sea duty in the South Pacific, Sputnik went up. I realized that humans would be right behind robot aircraft or spacecraft even though I really had no plans of being in aviation or a professional aviator and certainly not in the military.

Until Systers came into existence, the notion of a global 'community of women in computer science' did not exist.

I've loved physics from a young age, but I've also been interested in all sorts of big questions, from philosophy to evolution and neuroscience. And what those fields have in common is that they all aim to capture certain aspects of the same underlying universe.

What I want to do is encourage women to take on this incredibly exciting and fun challenge to use their brains for the benefit of humanity but through science and technology.

I decided that since I was trying to teach 'style' of thinking in science and engineering, and 'style' is an art, I should therefore copy the methods of teaching used for the other arts - once the fundamentals have been learned.