Arguments from authority carry little weight, authorities have made mistakes in the past. They will do so again in the future. Perhaps a better way to say it is that in science there are no authorities; at most, there are experts.
CARL SAGANThe 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.
More Carl Sagan Quotes
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The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
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All civilizations become either spacefaring or extinct.
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Perhaps the depth of love can be calibrated by the number of different selves that are actively involved in a given relationship.
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Books break the shackles of time, proof that humans can work magic.
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Other things being equal, it is better to be smart than to be stupid.
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Imagination will often carry us to worlds that never were, but without it we go nowhere.
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Stars are phoenixes, rising from their own ashes.
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If we continue to accumulate only power and not wisdom, we will surely destroy ourselves.
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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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Not all birds can fly. What separates the flyers from the walkers is the ability to take off.
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We are star stuff harvesting sunlight.
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Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.
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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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Extraordinary claims require extraordinary evidence.
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Across the sea of space, the stars are other suns.
CARL SAGAN