Roger McGuinn

I think what makes the Byrds stand up all these years is the basis in folk music. Folk music, being a timeless art form, is the foundation of the Byrds. We were all from a folk background. We considered ourselves folk singers even when we strapped on electric instruments and dabbled in different things.

My grandma actually put me in girdles when I was around nine or ten because I had hips even then, and she didn't want boys to be attracted to me. Having hips meant you were a full-grown woman, and I was too young for that.

I haven't modelled since I was 12 - that was a one-time thing, and I did it as a kid to make a little money to save up for university. Acting is my first love as well as writing and eventually producing and directing.

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.