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Science progresses best when observations force us to alter our preconceptions.
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Science is competitive, aggressive, demanding. It is also imaginative, inspiring, uplifting.
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We have peered into a new world and have seen that it is more mysterious and more complex than we had imagined. Still more mysteries of the universe remain hidden. Their discovery awaits the adventurous scientists of the future. I like it this way.
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Does Sex Matter? Of course it does. But does it matter enough to Matter? That's a different question.
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No observational problem will not be solved by more data.
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I live and work with three basic assumptions, 1) There is no problem in science that can be solved by a man that cannot be solved by a woman. 2) Worldwide, half of all brains are in women. 3) We all need permission to do science, but, for reasons that are deeply ingrained in history, this permission is more often given to men than to women.
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How stars move tell us that most matter in the universe is dark. When we see stars in the sky, we're only seeing five or 10 percent of the matter that there is in the universe.
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There is one alternative to dark matter, and that is the assumption that Newton's laws don't hold over distances as great as galaxies. But we know that Newton's laws hold over a very large domain. And virtually one hundred percent of the physics and astronomy community believes that there is matter in the universe that does not radiate.