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It's been fun doing interviews with the other astronauts, getting to hear: 'Oh, that's how he explains it' or 'That's how she thinks about it.' We work together, but we don't necessarily share all those thoughts or ideas.
One of the most beautiful sights is when the rim of the Earth is bright on one side, and you see this defined line of the atmosphere. You see how close and thin it is. We've got to be careful. We've got to take care of this planet.
We want people to continue learning new things about what space does to the human body. It's important for us to understand that and make sure when we get ready to fly to Mars that we are ready for what we're going to be exposed to.
I would certainly encourage young people to pursue their dreams. It isn't always an easy path, but it's worth going after. And I figure if a farmer's daughter from Iowa can become an astronaut, you can be just about anything you want to be.
I love working at NASA, but the part that has been the most satisfying on a day-to-day basis, hour-to-hour, minute-to-minute, has been working on board the space station. Even if I'm just cleaning the vents in the fans, it all is important.
On my first flight, I don't know if maybe it's a function of time, or if I was less stressed on my second flight, but just being able to tell what part of the planet we were flying over by the reflected light coming through the window - that was pretty special.
There is a potential to be a big explosion of what spaceflight is gonna mean to just an everyday person in the near future. I think it's very hopeful for our young people: all the exciting things that they could be doing in the future relative to space and space exploration.
You see billions and billions of stars and recognize that you know some of those have planets, too, and maybe there's life out there, and this is just one of billions of galaxies... and so it gives you this huge perspective of how far we potentially have to go for real exploration.
My parents are the hardest-working people I ever knew: they always worked every day, all day; they had to come up with the solutions to make things work. And I think that work ethic, maybe stubbornness, single-mindedness, definitely played a role for me. I'm definitely thankful for my roots.
Life in zero gravity is hard to simulate. We practice on the ground what we call 'the day in the life' simulations, but it's just practicing some of the tests. It can't prepare you for the fact that all of your tools float if you don't pay attention to where they are! If you don't Velcro things down, they're gonna float away.