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To be able to float and move around and, pretty much effortlessly, do whatever you want with your body in space is pretty amazing.
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Even if my job for the day is cleaning the vents or fixing the toilet, it still feels good to be a part of the space program and advancing exploration.
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I do think space hotels are probably in our future.
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I think, just philosophically, we're made to explore.
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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.
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Work ethic is probably my No. 1 value and No. 1 attribute.
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Everything every day here on Earth is based on gravity, and you don't realize it until you don't have it anymore.
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Viewing the earth from above gives you this sense of how special the planet is that we live on.
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It's like being a bird, maybe, the perspective of flying over the Earth.
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In terms of goals for NASA before I die, we need to be living on Mars. And I might not live that long, so they better get on with it!
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My undergraduate, I double-majored in biology and chemistry. Biology was kind of my love.
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Breaking records has never been my goal. I think it's important that we're continually pushing our limits and showing that we can extend beyond what we have done before.
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One of the things I think is really cool that we're testing on board the International Space Station is the water reclamation system.
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I was inspired by the men who walked on the moon. It really was my inspiration, I think, you know, as a kid of 9 years old - I know I'm dating myself, but - I thought, 'What a cool job!'
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In space for a short time, I think most people could survive that. If you're sending an average person who's healthy for a short period of time, I think that's quite doable.
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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.
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Gravity always sucks. It really, really does. It's a big challenge just re-adapting to feeling heavy again, you know? Even my arm feels heavy. My legs feel heavy.
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The first time I went into space was just so much more than you could imagine or prepare yourself for.
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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.
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I think probably the discoveries made by Hubble Space Telescope have been very dramatic, very amazing.
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Drive and desire was something I was raised with. It became a very important part of how I've become.
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The advice I give young people is that you have to pursue something, and you have to have fun along the way.
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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.
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Find your passion. Because with that passion, you can do anything.