If we could do something that enhances the body's immune system here on Earth, it would be a tremendous step forward in the fight against disease and cancer and other things.

The most important thing we can do is inspire young minds and to advance the kind of science, math and technology education that will help youngsters take us to the next phase of space travel.

I hate to think that we may be out there seven to ten years out and dependent on the Russians for our journey into space.

As far as actually setting up colonies of people who would live their whole lives in space, I think we're a long ways from doing that yet, and I think we have many, many decades before we could be able to even consider something like that.

Zero G and I feel fine.

The moment of twilight is simply beautiful.

Too many people, when they get old, think that they have to live by the calendar.