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Climate has been changing for billions of years.
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Every couple of years, we could dispatch people from Earth to Mars.
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I am definitely not rich.
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Nobody ever asks who was the seventh person on the Moon. The only thing they know is who's number one and who's number two. Does anybody know who the last man was?
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You are not going to change the minds of people who are looking for attention.
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No dream is too high for those with their eyes in the sky.
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By venturing into space, we improve life for everyone here on Earth - scientific advances and innovations that come from this kind of research create products we use in our daily lives.
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We need the next generation to be motivated and to push technological boundaries, to seek out new innovations.
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You can tell I'm not too bashful about some of my feelings.
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I know: If you're looking down at Earth, you're looking through an atmosphere that has a bit of haze in many places and not just occasional clouds.
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Going back to the moon is not visionary in restoring space leadership for America. Like its Apollo predecessor, it will prove to be a dead end littered with broken spacecraft, broken dreams and broken policies.
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When we get there, if we don't find any life on Mars, from that point on there will be life on Mars because we'll bring it there, whether it's germs and leftover urine bags, whatever it is.
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There's no doubt that there will be many trials and tribulations along the way in taming space for the benefit of all, unmasking its truths and using the boundless resources available to us. Taking a chance allows us to seek new horizons -- and we all benefit from being horizon hunters.
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Mars is the symbolic and totally stimulating next objective that could so dominate the next century's exploration efforts. From Mars, the resources of all the asteroids will become readily available.