By going to Mars one day, we will make things better for us here on Earth.

We had this incredible pass over the Himalayas, and to just see all of that pollution that's riding up against those mountains from the south is just really heartbreaking.

I believe in the importance of flying in space and the research that we do.

Something people don't recognize is that being on the space station is probably a lot like being in some kind of confinement - like isolation.

I'm actually thinking about maybe, on a spacewalk, not wearing my glasses. I normally wear those both for reading and a little bit of a distance correction, but the distance vision seems like it's gotten a little bit better. So I might go without.

We're fortunate to have football on the space station.

I personally think going to Mars, if it takes two years or two and a half years, that's doable. Certainly, the first people who go there, that's going to be a big motivator, being first getting to Mars.

What we look for are people that are technically competent. You need a background in a scientific field, whether it's as a scientist, an engineer, medical doctor, or, you know, a person that's in the military with some kind of technical background.

Flying in space is a privilege, whether it's the first time or the fourth time.

I went to the University of Maryland for a year and was considering maybe, you know, being a medical doctor but decided my other interest was maybe flying airplanes in the Navy and just kind of changed my mind and changed schools and changed majors and decided to focus a hundred percent on that.