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Who said: “We are here to celebrate the completion of the first survey of the entire human genome. Without a doubt, this is the most important, most wondrous map ever produced by human kind.”
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Adapting from the earlier book Gravitation, I wrote, “Spacetime tells matter how to move; matter tells spacetime how to curve.” In other words, a bit of matter (or mass, or energy) moves in accordance with the dictates of the curved spacetime where it is located. … At the same time, that bit of mass or energy is itself contributing to the curvature of spacetime everywhere.
With co-author Kenneth William Ford Geons, Black Holes, and Quantum Foam: A Life in Physics (1998, 2010), 235. Adapted from his earlier book, co-authored with Charles W. Misner and Kip S. Thorne, Gravitation (1970, 1973), 5, in which one of the ideas in Einstein’s geometric theory of gravity was summarized as, “Space acts on matter, telling it how to move. In turn, matter reacts back on space, telling it how to curve”.
Science quotes on:  |  Curve (16)  |  Energy (163)  |  Gravitation (25)  |  Mass (49)  |  Matter (228)  |  Move (30)  |  Spacetime (4)

The scientist is not much given to talking of the riddle of the universe. “Riddle” is not a scientific term. The conception of a riddle is “something which can he solved.” And hence the scientist does not use that popular phrase. We don’t know the why of anything. On that matter we are no further advanced than was the cavedweller. The scientist is contented if he can contribute something toward the knowledge of what is and how it is.
As quoted in 'Electricity Will Keep The World From Freezing Up', New York Times (12 Nov 1911), SM4.
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Whenever a new scientific concept comes into prominence, it sends shock waves of surprise to the scholars contributing to that field.
In The Gene: A Critical History (1966), 77.
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Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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- 90 -
Antoine Lavoisier
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- 80 -
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- 40 -
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Carl Sagan
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- 10 -
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