The experience of being in space didn't change my perspective of myself or of the planet or of life. I had no spiritual experience.

I didn't really decide that I wanted to be an astronaut for sure until the end of college.

The best advice I can give anybody is to try to understand who you are and what you want to do, and don't be afraid to go down that road and do whatever it takes and work as hard as you have to work to achieve that.

I suggest taking the high road and have a little sence of humour and let things roll off your back. I think that's very important.

Rocket science is tough, and rockets have a way of failing.

I slept just floating in the middle of the flight deck, the upper deck of the space shuttle.

So I decided on science when I was in college.