Space is dark but, of course, when we're on the sun side of the Earth, we're in full illumination and we have all the reflection of the Earth below us, beautiful blue Earth and we're in daylight. Only on the back side, opposite side of the sun, it seems like night to us, too.

A lot of scientists on Earth think of things that they could do in zero g. Things like the way metals cure, for example, and the way fluids react in space can tell us a lot about some of the unknowns we have on Earth.

Space station is, it really is one of the more, if not the most, impressive technological achievement of the modern day, not only in what we've accomplished engineering-wise but what we've accomplished on this international scale, because anybody will tell you that half the challenge is making it all work.

There is a dark side to Allan Guthrie, but only at the weekends.

When you have a dark side, nothing is ever as good as it seems.

I don't have a dark side at all. I just like violence.