Be grateful everyday for the brief but magnificent opportunity that life provides.
CARL SAGANThere are as many atoms in one molecule of DNA as there are stars in a typical galaxy.
More Carl Sagan Quotes
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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.
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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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We make our world significant by the courage of our questions and the depth of our answers.
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All civilizations become either spacefaring or extinct.
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All over the world there are enormous numbers of smart, even gifted, people who harbor a passion for science.
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One glance at a book and you hear the voice of another person, perhaps someone dead for 1,000 years. To read is to voyage through time.
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Avoidable human misery is more often caused not so much by stupidity as by ignorance, particularly our ignorance about ourselves.
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The visions we offer our children shape the future.
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The universe seems neither benign nor hostile, merely indifferent.
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Nature is always more subtle, more intricate, more elegant than what we are able to imagine.
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For small creatures such as we the vastness is bearable only through love.
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Science is an attempt, largely successful, to understand the world, to get a grip on things, to get hold of ourselves, to steer a safe course.
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We can’t help it. Life looks for life.
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Human beings have a demonstrated talent for self-deception when their emotions are stirred.
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The Earth is the only world known so far to harbor life.
CARL SAGAN