We live in a vast and awesome universe in which, daily, suns are made and worlds destroyed, where humanity clings to an obscure clod of rock.
CARL SAGANThe total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.
More Carl Sagan Quotes
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The universe is not required to be in perfect harmony with human ambition.
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Extraordinary claims require extraordinary evidence.
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For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.
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Every kid starts out as a natural-born scientist, and then we beat it out of them. A few trickle through the system with their wonder and enthusiasm for science intact.
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I consider it an extremely dangerous doctrine, because the more likely we are to assume that the solution comes from the outside, the less likely we are to solve our problems ourselves.
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Better the hard truth, I say, than the comforting fantasy.
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The visions we offer our children shape the future.
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We are all stardust.
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Except in pure mathematics, nothing is known for certain (although much is certainly false).
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Nature is unsentimental. Death is built in.
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I think the health of our civilization, the depth of our awareness about the underpinnings of our culture and our concern for the future can all be tested by how well we support our libraries.
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Stars are phoenixes, rising from their own ashes.
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To live in the hearts we leave behind is to live forever.
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Exploration is in our nature. We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.
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There are as many atoms in one molecule of DNA as there are stars in a typical galaxy.
CARL SAGAN