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" There's no question that if we stay on planet Earth and never leave, that eventually we'll be wiped out. "
John M. Grunsfeld
Earth
Leave
Never
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" As a young boy growing up on the South Side of Chicago, I was inspired by the nascent space age. "
John M. Grunsfeld
Growing Up
Growing
Chicago
" A lot of people get home from work and sink into a good chair, the place in their life where they feel most comfortable. I get that comfort in space, the place where I most feel like I belong. "
John M. Grunsfeld
Work
Space
Home
" One of the things that happens in space is that there is a fluid shift. You get a lot of extra pressure, and it fills your sinuses, and the horseradish is a miracle worker for cleaning that out. "
John M. Grunsfeld
You
Cleaning
Miracle
" Sometimes astronauts feel a little ill or get minor scrapes. I trained as a crew medical officer to do basic treatment. "
John M. Grunsfeld
Astronauts
Medical
Feel
" All space exploration is risky. As an astronaut, I had to decide each and every time I went to space whether or not to risk my life for the mission. "
John M. Grunsfeld
Time
Life
Mission
" I was not really scared on my spacewalks. We practice so much and need to stay so focused that it has a calming effect on me. I do a kind of visualization and meditation in the airlock prior to going outside, to guide my first activities once I get out in space. "
John M. Grunsfeld
Me
Meditation
Need
" Here we were, the only seven humans in space, repairing a telescope whose only purpose is to enrich the minds of people on planet Earth and increase our understanding of the workings of the universe. I can think of no better peaceful use of space for all humankind. "
John M. Grunsfeld
Peaceful
Think
Space
" What we do at NASA is inspiring. It's reaching, it's visionary, and it inspires people on Earth to try hard things. "
John M. Grunsfeld
Try
People
Earth
" Here on Earth, we're exposed to asteroids hitting the Earth, eventual changes in the Sun, changes in the Earth's climate, things we're doing to the Earth's climate. If we want to survive, we need to become a multi-planet species. That's further down the road, but the first wave is going to be the explorers. "
John M. Grunsfeld
Doing
Sun
Need
" The biggest honor is to be an astronaut. It's such a tremendous privilege to be able to represent humankind in our quest to explore space. "
John M. Grunsfeld
Quest
Space
Explore
" All indications are that three and a half billion years ago, Mars looked like Earth. It had lakes. It had rivers. It had river deltas. It had snow-capped peaks and puffy clouds and blue sky. Three and a half billion years ago, it was a happening place. The same time on Earth, that's when life started. So did life start on Mars? "
John M. Grunsfeld
Time
Sky
Clouds
" I think that space exploration as a broad activity is the most important things that humans can do. I've always found it fascinating, interesting, compelling, and I have a drive to go out into space. "
John M. Grunsfeld
Space
Always
Drive
" Are we alone? Many, many people on planet Earth want to know. We are on the cusp of being able to answer that question... because of the investments we're making in space technology. "
John M. Grunsfeld
Alone
Know
People
" When I grew up on the south side of Chicago, it was kind of a rough neighborhood, and when my parents saw the prospect of my older sister going to middle school, high school, they decided that we would move to the north side of Chicago, Highland Park, and for me, that was a whole new ballgame. "
John M. Grunsfeld
Sister
High School
School
" I got lucky and got assigned to Hubble. "
John M. Grunsfeld
Hubble
Got
Assigned
" When people left on the Oregon Trail from St. Louis, they knew that only a fraction of them would make it to the West Coast. But they went anyway. "
John M. Grunsfeld
Only
West
Trail
" I grew up on the south side of Chicago in the 1960s, and I think there was a synchronicity of events that inspired me to be an astronaut, and, of course, the backdrop is nothing less than Mercury, Gemini, and Apollo. That was a time in our nation where we aspired to great things, and we achieved them. "
John M. Grunsfeld
Chicago
Me
Nothing
" Life outside of Earth is probably going to be really hard to find. "
John M. Grunsfeld
Find
Earth
Going
" I believe that the future of humans, and the future of Earth, depends on space exploration. That's not a French problem, or a problem for Alabama: it's a planet-wide problem. International cooperation is crucial. "
John M. Grunsfeld
Earth
Believe
Future
" After my spacewalks, I am quite exhilarated but also tired, similar to a workout on Planet Earth. "
John M. Grunsfeld
Planet
Workout
Am
" Being an astronaut, there are not a lot of things that have really shocked me in my life. "
John M. Grunsfeld
Life
Things
Really
" Asteroid detection, tracking, and defense of our planet is something that NASA, its interagency partners, and the global community take very seriously. "
John M. Grunsfeld
Defense
Seriously
NASA
" Going to Mars would make NASA great again. "
John M. Grunsfeld
Mars
Great
Going
" We need to move off the planet. And Mars is the next best place. "
John M. Grunsfeld
Need
Move
Mars
" The truth is, every single rocket launch off of planet Earth is risky. "
John M. Grunsfeld
Launch
Earth
Rocket
" Growing up in Highland Park, in high school, I had some very influential teachers: I had a math teacher who taught calculus that helped me learn to be in love with mathematics; I had a chemistry teacher who inspired us to work what was in the class and to go beyond. "
John M. Grunsfeld
Work
Teacher
Love
" The Martian atmosphere is very thin. It's like our atmosphere at 100,000 feet. "
John M. Grunsfeld
Atmosphere
Our
Feet
" I see no difference between scientific exploration and human exploration. "
John M. Grunsfeld
Human
See
Exploration
" Only by studying large numbers of people can we figure out, are astronauts dying at a higher rate of cancer, and what types of cancers, than other people? "
John M. Grunsfeld
People
Studying
Dying
" The only reason Hubble works is because we have a space shuttle. "
John M. Grunsfeld
Space
Reason
Only