1. “Mathematics is the language with which God has written the universe.”

— Galileo Galilei

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2. “Real science can be far stranger than science fiction and much more satisfying.”

— Stephen Hawking

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3. “Nothing exists except atoms and empty space; everything else is opinion.”

— Democritus

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4. “Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world.”

— Louis Pasteur

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5. “Science is a way of thinking much more than it is a body of knowledge.”

— Carl Sagan

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6. “Science may set limits to knowledge, but should not set limits to imagination.”

— Bertrand Russell

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7. “The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.”

— Isaac Asimov

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8. “We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.”

— Carl Sagan

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9. “Mathematics is the key and door to the sciences.”

— Galileo Galilei

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10. “Research is formalized curiosity. It is poking and prying with a purpose.”

— Zora Neale Hurston

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11. “Ignorance more frequently begets confidence than does knowledge.”

— Charles Darwin

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12. “Science, my lad, is made up of mistakes, but they are mistakes which it is useful to make, because they lead little by little to the truth.”

— Jules Verne

13. “One thing in life is for certain, the more profoundly baffled you have been in your life, the more open your mind becomes to new ideas.”

— Neil deGrasse Tyson

14. “The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself.”

— Carl Sagan

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15. “The good thing about science is that it’s true whether or not you believe in it.”

— Neil deGrasse Tyson

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16. “The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.”

— Carl Sagan

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17. “For every action, there is an equal and opposite reaction.”

— Isaac Newton

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18. “If you’re scientifically literate, the world looks very different to you, and that understanding empowers you.”

— Neil deGrasse Tyson

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19. “What can be asserted without evidence can be dismissed without evidence.”

— Christopher Hitchens

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20. “We are made of star-stuff. Our bodies are made of star-stuff. There are pieces of star within us all.”

— Carl Sagan

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21. “An object that is at rest will tend to stay at rest. An object that is in motion will tend to stay in motion.”

— Isaac Newton

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22. “The lesson of the book is that the universe is governed by the laws of science.”

— Stephen Hawking

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23. “The remarkable feature of physical laws is that they apply everywhere, whether or not you choose to believe in them. After the laws of physics, everything else is opinion.”

— Neil deGrasse Tyson

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24. “Nothing in biology makes sense except in the light of evolution.”

— Theodosius Dobzhansky

25. “The Cosmos is all that is or ever was or ever will be.”

— Carl Sagan

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26. “It’s the gravity that shapes the large scale structure of the universe, even though it is the weakest of four categories of forces.”

— Stephen Hawking

27. “Science literacy is a vaccine against the charlatans of the world that would exploit your ignorance.”

— Neil deGrasse Tyson

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28. “Science is more than a body of knowledge. It’s a way of thinking: a way of skeptically interrogating the universe.”

— Carl Sagan

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29. “If I have questions about the universe on my mind when I go to bed, I can’t turn off. I dream equations all night.”

— Stephen Hawking

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30. “Relativity. Gravity. Quantum. Electrodynamics. Evolution. Each of these theories is true, whether or not you believe in them.”

— Neil deGrasse Tyson

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31. “Science is what we have learned about how to keep from fooling ourselves.”

— Richard P. Feynman

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32. “I am among those who think that science has great beauty.”

— Marie Curie

33. “Science is beautiful when it makes simple explanations of phenomena or connections between different observations.”

— Stephen Hawking

34. “Space exploration is a force of nature unto itself that no other force in society can rival.”

— Neil deGrasse Tyson

35. “The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.”

— F. Scott Fitzgerald

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36. “Endless forms most beautiful and most wonderful have been, and are being evolved.”

— Charles Darwin

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37. “There are in fact 100 billion galaxies, each of which contain something like a 100 billion stars. Think of how many stars, and planets, and kinds of life there may be in this vast and awesome universe.”

— Carl Sagan

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38. “Observations indicate that the universe is expanding at an ever increasing rate. It will expand forever, getting emptier and darker.”

— Stephen Hawking

39. “As a child, I wanted to know how things worked and to control them. With a friend, I built a number of complicated models that I could control. It was a natural next step to want to know how the universe works.”

— Stephen Hawking

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40. “The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.”

— Carl Sagan

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41. “You and I are made of stardust. We are the stuff of exploded stars. We are therefore, at least 1 way that the Universe knows itself. That, to me, is astonishing.”

— Bill Nye

42. “Intelligence is the ability to adapt to change. ”

— Stephen Hawking

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43. “There is a fundamental difference between religion, which is based on authority, and science, which is based on observation and reason. Science will win because it works.”

— Stephen Hawking

44. “Science is like an inoculation against charlatans who would have you believe whatever it is they tell you.”

— Neil deGrasse Tyson

45. “What we know is a drop, what we don’t know is an ocean.”

— Isaac Newton

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46. “I don't want to believe. I want to know.”

— Carl Sagan

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47. “If I have seen further it is by standing on the shoulders of Giants.”

— Isaac Newton

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48. “We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.”

— Stephen Hawking

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49. “Math is the language of the universe. So the more equations you know, the more you can converse with the cosmos.”

— Neil deGrasse Tyson

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50. “If time travel is possible, where are the tourists from the future?”

— Stephen Hawking

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