I did play the guitar and sing; I was in a band called The Estrogens: three females and one very brave guy.

I read about eastern philosophy and religion and existentialism. All that introspective thinking got me thinking about the great beyond. That turned my sights from inwards to outwards, and I started becoming interested in the makeup of the universe, and I started reading about astronomy, planets, and galaxies.

The Saturn system is a rich planetary system. It offers mystery, scientific insight, and obviously splendour beyond compare, and the investigation of this system has enormous cosmic reach... just studying the rings alone, we stand to learn a lot about the discs of stars and gas that we call the spiral galaxies.

Every type of ring behavior we have seen around Jupiter, Uranus, or Neptune can be found in orbit around Saturn. And Saturn's ring system offers the greatest promise of understanding processes in operation within all disk systems, not just those found around planets.

I've become interested in the impact of climate change on the world and the future of energy needs for the developing world.

I have a nice car, a Mercedes. And then I have an old El Camino truck that I'm crazy about. I like to get in that truck and go up in the hills near where I live, in Vegas, and take my camera. That, to me, is Heaven, being out in nature, taking pictures of the wildlife.

Geological change usually takes thousands of years to happen but we are seeing the climate changing not just in our lifetimes but also year by year.

Building power plants would do more to lift people out of poverty than the Green Climate Fund ever will.