photo of Carl SaganPhoto Credit: WikiMedia Commons

Quotes by Carl Sagan

Welcome to our collection of quotes (with shareable picture quotes) by Carl Sagan. We hope you enjoy pondering them and that you will share them widely.

Wikipedia Summary for Carl Sagan

Carl Edward Sagan (November 9, 1934 – December 20, 1996) was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. Sagan assembled the first physical messages sent into space: the Pioneer plaque and the Voyager Golden Record, universal messages that could potentially be understood by any extraterrestrial intelligence that might find them. Sagan argued the now-accepted hypothesis that the high surface temperatures of Venus can be attributed to and calculated using the greenhouse effect.

Initially an associate professor at Harvard and later at Cornell, from 1976 to his death, he was the David Duncan Professor of Astronomy and Space Sciences at the latter. Sagan published more than 600 scientific papers and articles and was author, co-author or editor of more than 20 books. He wrote many popular science books, such as The Dragons of Eden, Cosmos, Broca's Brain and Pale Blue Dot, and narrated and co-wrote the award-winning 1980 television series Cosmos: A Personal Voyage. The most widely watched series in the history of American public television, Cosmos has been seen by at least 500 million people across 60 different countries. The book Cosmos was published to accompany the series. He also wrote the science fiction novel Contact, the basis for a 1997 film of the same name. His papers, containing 595,000 items, are archived at The Library of Congress.

Sagan advocated scientific skeptical inquiry and the scientific method, pioneered exobiology and promoted the Search for Extra-Terrestrial Intelligence (SETI). He spent most of his career as a professor of astronomy at Cornell University, where he directed the Laboratory for Planetary Studies. Sagan and his works received numerous awards and honors, including the NASA Distinguished Public Service Medal, the National Academy of Sciences Public Welfare Medal, the Pulitzer Prize for General Non-Fiction for his book The Dragons of Eden, and, regarding Cosmos: A Personal Voyage, two Emmy Awards, the Peabody Award, and the Hugo Award. He married three times and had five children. After suffering from myelodysplasia, Sagan died of pneumonia at the age of 62, on December 20, 1996.

Quote: It is the tension between creativity and skepticism that has produced the stunning and unexpected findings of science. by author Carl Sagan overlaid on photo of low angle photography of drop lights
Photo Credit: Skye Studios

It is the tension between creativity and skepticism that has produced the stunning and unexpected findings of science.


Quote: This oak tree and me, we're made of the same stuff. by author Carl Sagan overlaid on photo of green fruit in macro lens photography
Photo Credit: Philipp Schneidenbach

This oak tree and me, we're made of the same stuff.


Quote: We are like butterflies who flutter for a day and think it is forever. by author Carl Sagan overlaid on photo of brown, black, and white butterfly on purple petaled flower photo
Photo Credit: Dan Freeman

We are like butterflies who flutter for a day and think it is forever.


Quote: You have to know the past to understand the present. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

You have to know the past to understand the present.


Quote: The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together. by author Carl Sagan overlaid on photo of lion on green grass during golden hour
Photo Credit: Keyur Nandaniya

The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together.

Longer Version/[Notes]:

The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together. Information distilled over 4 billion years of biological evolution. Incidentally, all the organisms on the Earth are made essentially of that stuff. An eyedropper full of that liquid could be used to make a caterpillar or a petunia if only we knew how to put the components together.


Quote: For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring. by author Carl Sagan overlaid on photo of yellow green leaf
Photo Credit: Annie Spratt

For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.


Quote: For small creatures such as we the vastness is bearable only through love. by author Carl Sagan overlaid on photo of woman in gray knit sweater covering her face with her hand
Photo Credit: Liz Fitch

For small creatures such as we the vastness is bearable only through love.


Quote: Imagination will often carry us to worlds that never were. But without it we go nowhere. by author Carl Sagan overlaid on photo of yellow, orange, red, green, and blue abstract painting
Photo Credit: Markus Spiske

Imagination will often carry us to worlds that never were. But without it we go nowhere.


Quote: The universe seems neither benign nor hostile, merely indifferent to the concerns of such puny creatures as we are. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The universe seems neither benign nor hostile, merely indifferent to the concerns of such puny creatures as we are.


Quote: Cleverly designed experiments are the key. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Cleverly designed experiments are the key.


Quote: The chemistry of coal is still not fully understood, despite a long standing economic incentive. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The chemistry of coal is still not fully understood, despite a long standing economic incentive.


Quote: I don't know where i am going but I'm on my way. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

I don't know where i am going but I'm on my way.


Quote: The illegality of cannabis is outrageous, an impediment to full utilization of a drug which helps produce the serenity and insight, sensitivity and fellowship, so desperately needed in this increasingly mad and dangerous world. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The illegality of cannabis is outrageous, an impediment to full utilization of a drug which helps produce the serenity and insight, sensitivity and fellowship, so desperately needed in this increasingly mad and dangerous world.


Quote: The Universe is a pretty big place. If it's just us, seems like an awful waste of space. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The Universe is a pretty big place. If it's just us, seems like an awful waste of space.


Quote: Our ancestors worshipped the Sun, and they were not that foolish. It makes sense to revere the Sun and the stars, for we are their children. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Our ancestors worshipped the Sun, and they were not that foolish. It makes sense to revere the Sun and the stars, for we are their children.


Quote: Extraordinary claims demand extraordinary evidence. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Extraordinary claims demand extraordinary evidence.


Quote: There is nothing inhuman about an intelligent machine; it is indeed an expression of those superb intellectual capabilities that only human beings, of all the creatures on our planet, now possess. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

There is nothing inhuman about an intelligent machine; it is indeed an expression of those superb intellectual capabilities that only human beings, of all the creatures on our planet, now possess.




Quote: We're in very bad trouble if we don't understand the planet we're trying to save. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

We're in very bad trouble if we don't understand the planet we're trying to save.


Quote: The fossil record implies trial and error, the inability to anticipate the future, features inconsistent with a Great Designer (though not a Designer of a more remote and indirect temperament.). by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The fossil record implies trial and error, the inability to anticipate the future, features inconsistent with a Great Designer (though not a Designer of a more remote and indirect temperament.).


Quote: Human beings grew up in forests; we have a natural affinity for them. How lovely a tree is, straining toward the sky. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Human beings grew up in forests; we have a natural affinity for them. How lovely a tree is, straining toward the sky.


Quote: We achieve some measure of adulthood when we recognize our parents as they really were, without sentimentalizing or mythologyzing, but also without blaming them unfairly for our imperfections. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

We achieve some measure of adulthood when we recognize our parents as they really were, without sentimentalizing or mythologyzing, but also without blaming them unfairly for our imperfections.


Quote: Atoms are mainly empty space. Matter is composed chiefly of nothing. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Atoms are mainly empty space. Matter is composed chiefly of nothing.


Quote: The passion to explore is at the heart of being human. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The passion to explore is at the heart of being human.


Quote: The first law of bureaucracy is to guarantee its own continuance. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The first law of bureaucracy is to guarantee its own continuance.




Quote: The usual rejoinder to someone who says 'They laughed at Columbus, they laughed at Galileo' is to say 'But they also laughed at Bozo the Clown'. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The usual rejoinder to someone who says 'They laughed at Columbus, they laughed at Galileo' is to say 'But they also laughed at Bozo the Clown'.


Quote: Civilization is a product of the cerebral cortex. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Civilization is a product of the cerebral cortex.


Quote: If we can accomplish the integration of the search without obliterating cultural differences or destroying ourselves, we will have accomplished a great thing. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

If we can accomplish the integration of the search without obliterating cultural differences or destroying ourselves, we will have accomplished a great thing.


Quote: She had spent her career attempting to make contact with the most remote and alien of strangers, while in her own life she had made contact with hardly anyone at all. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

She had spent her career attempting to make contact with the most remote and alien of strangers, while in her own life she had made contact with hardly anyone at all.


Quote: If the laws of nature are unpredictably reassorted at the cusps (the transition from contraction to expansion of the universe), then it is only by the most extraordinary coincidence that the cosmic slot machine has this time come up with a universe consistent with us. by author Carl Sagan overlaid on photo of Carl Sagan quote; white text on black background

If the laws of nature are unpredictably reassorted at the cusps (the transition from contraction to expansion of the universe), then it is only by the most extraordinary coincidence that the cosmic slot machine has this time come up with a universe consistent with us.


Quote: We have examined the universe in space and seen that we live on a mote of dust circling a humdrum star in the remotest corner of an obscure galaxy. And if we are a speck in the immensity of space, we also occupy an instant in the expanse of ages. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

We have examined the universe in space and seen that we live on a mote of dust circling a humdrum star in the remotest corner of an obscure galaxy. And if we are a speck in the immensity of space, we also occupy an instant in the expanse of ages.


Quote: The well-meaning contention that all ideas have equal merit seems to me little different from the disastrous contention that no ideas have any merit. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The well-meaning contention that all ideas have equal merit seems to me little different from the disastrous contention that no ideas have any merit.


Quote: All the explanations proposed seem to be
only partly satisfactory. They range from massive climatic change to mammalian predation to the extinction of a plant with apparent laxative properties, in which case the dinosaurs died of constipation. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

All the explanations proposed seem to be
only partly satisfactory. They range from massive climatic change to mammalian predation to the extinction of a plant with apparent laxative properties, in which case the dinosaurs died of constipation.


Quote: I know of no significant advance in science that did not require major inputs from both cerebral hemispheres. This is not true for art, where apparently there are no experiments by which capable, dedicated and unbiased observers can determine to their mutual satisfaction which works are great. by author Carl Sagan overlaid on photo of Carl Sagan quote: I know of no significant advance in science that did not require major inputs from both cerebral hemispheres. This is not true for art, where apparently there are no experiments by which capable, dedicated and unbiased observers can determine to their mutual satisfaction which works are great.- black text on quotes background

I know of no significant advance in science that did not require major inputs from both cerebral hemispheres. This is not true for art, where apparently there are no experiments by which capable, dedicated and unbiased observers can determine to their mutual satisfaction which works are great.


Quote: Once we lose our fear of being tiny, we find ourselves on the threshold of a vast and awesome Universe which dwarfs -- in time, in space, and in potential -- the tidy anthropocentric proscenium of our ancestors. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Once we lose our fear of being tiny, we find ourselves on the threshold of a vast and awesome Universe which dwarfs -- in time, in space, and in potential -- the tidy anthropocentric proscenium of our ancestors.




Quote: The cosmos is full beyond measure of elegant truths; of exquisite interrelationships; of the awesome machinery of nature. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The cosmos is full beyond measure of elegant truths; of exquisite interrelationships; of the awesome machinery of nature.

Longer Version/[Notes]:

The cosmos is full beyond measure of elegant truths; of exquisite interrelationships; of the awesome machinery of nature. The surface of the Earth is the shore of the cosmic ocean. On this shore we've learned most of what we know. Recently we've waded a little way out, maybe ankle deep, and the water seems inviting. Some part of our being knows this is where we came from. We long to return. And we can. Because the cosmos is also within us. We're made of star-stuff. We are a way for the cosmos to know itself.


Quote: Vast migrations of people -some voluntary, most not- have shaped the human condition. More of us flee from war, oppression and famine today than at any other time in human history. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Vast migrations of people -some voluntary, most not- have shaped the human condition. More of us flee from war, oppression and famine today than at any other time in human history.


Quote: There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths.


Quote: Perhaps the locale of the subjunctive mood will
one day be found. Will Latins turn out to be extravagantly endowed and English-speaking peoples significantly short-changed in this minor piece of brain anatomy? by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Perhaps the locale of the subjunctive mood will
one day be found. Will Latins turn out to be extravagantly endowed and English-speaking peoples significantly short-changed in this minor piece of brain anatomy?








Quote: And after the Earth dies, some 5 billion years from now, after it is burned t a crisp or even swallowed by the Sun, there will be other worlds and stars and galaxies coming into being- and they will know nothing of a place once called Earth. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

And after the Earth dies, some 5 billion years from now, after it is burned t a crisp or even swallowed by the Sun, there will be other worlds and stars and galaxies coming into being- and they will know nothing of a place once called Earth.


Quote: It's been said that astronomy is a humbling and, I might add, a character-building experience. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

It's been said that astronomy is a humbling and, I might add, a character-building experience.


Quote: One's inability to invalidate your hypothesis is not at all the same thing as proving it true. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

One's inability to invalidate your hypothesis is not at all the same thing as proving it true.


Quote: I would suggest that science is, at least in my part, informed worship. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

I would suggest that science is, at least in my part, informed worship.


Quote: There are wonders enough out there without our inventing any. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

There are wonders enough out there without our inventing any.


Quote: Except in pure mathematics, nothing is known for certain (although much is certainly false). by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Except in pure mathematics, nothing is known for certain (although much is certainly false).


Quote: But nature is always more subtle, more intricate, more elegant than what we are able to imagine. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

But nature is always more subtle, more intricate, more elegant than what we are able to imagine.


Quote: Cosmos is a Greek word for the order of the universe. It is, in a way, the opposite of Chaos. It implies the deep interconnectedness of all things. It conveys awe for the intricate and subtle way in which the universe is put together. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Cosmos is a Greek word for the order of the universe. It is, in a way, the opposite of Chaos. It implies the deep interconnectedness of all things. It conveys awe for the intricate and subtle way in which the universe is put together.


Quote: For all our failings, despite our limitations and fallibilities, we humans are capable of greatness. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

For all our failings, despite our limitations and fallibilities, we humans are capable of greatness.


Quote: If you grow up in a household where there are books, where you are read to, where parents, siblings, aunts, uncles, and cousins read for their own pleasure, naturally you learn to read. If no one close to you takes joy in reading, where is the evidence that it's worth the effort? by author Carl Sagan overlaid on photo of Carl Sagan quote; white text on black background

If you grow up in a household where there are books, where you are read to, where parents, siblings, aunts, uncles, and cousins read for their own pleasure, naturally you learn to read. If no one close to you takes joy in reading, where is the evidence that it's worth the effort?


Quote: We knew the Moon from our earliest days. It was there when our ancestors descended from the trees into the savannahs, when we learned to walk upright, when we first devised stone tools, when we domesticated fire, when we invented agriculture and built cities and set out to subdue the Earth. by author Carl Sagan overlaid on photo of Carl Sagan quote: We knew the Moon from our earliest days. It was there when our ancestors descended from the trees into the savannahs, when we learned to walk upright, when we first devised stone tools, when we domesticated fire, when we invented agriculture and built cities and set out to subdue the Earth.- black text on quotes background

We knew the Moon from our earliest days. It was there when our ancestors descended from the trees into the savannahs, when we learned to walk upright, when we first devised stone tools, when we domesticated fire, when we invented agriculture and built cities and set out to subdue the Earth.


Quote: The difference between physics and metaphysics is not that the practitioners of one are smarter than the practitioners of the other. The difference is that the metaphysicist has no laboratory. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The difference between physics and metaphysics is not that the practitioners of one are smarter than the practitioners of the other. The difference is that the metaphysicist has no laboratory.


Quote: Our children long for realistic maps of the future that they can be proud of. Where are the cartographers of human purpose? by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Our children long for realistic maps of the future that they can be proud of. Where are the cartographers of human purpose?


Quote: I would be very ashamed of my civilization if we did not try to find out if there is life in outer space. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

I would be very ashamed of my civilization if we did not try to find out if there is life in outer space.






Quote: My favorite color: A pale blue dot suspended in a sunbeam. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

My favorite color: A pale blue dot suspended in a sunbeam.




Quote: But if the Bible is not everywhere literally true, which parts are divinely inspired and which are merely fallible and human? As soon as we admit that there are scriptural mistakes (or concessions to the ignorance of the times), then how can the Bible be an inerrant guide to ethics and morals? by author Carl Sagan overlaid on photo of Carl Sagan quote: But if the Bible is not everywhere literally true, which parts are divinely inspired and which are merely fallible and human? As soon as we admit that there are scriptural mistakes (or concessions to the ignorance of the times), then how can the Bible be an inerrant guide to ethics and morals?- black text on quotes background

But if the Bible is not everywhere literally true, which parts are divinely inspired and which are merely fallible and human? As soon as we admit that there are scriptural mistakes (or concessions to the ignorance of the times), then how can the Bible be an inerrant guide to ethics and morals?


Quote: Ask courageous questions. Do not be satisfied with superficial answers. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Ask courageous questions. Do not be satisfied with superficial answers.

Longer Version/[Notes]:

Ask courageous questions. Do not be satisfied with superficial answers. Be open to wonder and at the same time subject all claims to knowledge, without exception, to intense skeptical scrutiny. Be aware of human fallibility. Cherish your species and your planet.




Quote: Even if the aliens are short, dour, and sexually obsessed--if they're here, I want to know about them. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Even if the aliens are short, dour, and sexually obsessed--if they're here, I want to know about them.






Quote: We wish to find the truth, no matter where it lies. But to find the truth we need imagination and skepticism both. We will not be afraid to speculate, but we will be careful to distinguish speculation from fact. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

We wish to find the truth, no matter where it lies. But to find the truth we need imagination and skepticism both. We will not be afraid to speculate, but we will be careful to distinguish speculation from fact.


Quote: If we like them, they're freedom fighters, she thought. If we don't like them, they're terrorists. In the unlikely case we can't make up our minds, they're temporarily only guerrillas. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

If we like them, they're freedom fighters, she thought. If we don't like them, they're terrorists. In the unlikely case we can't make up our minds, they're temporarily only guerrillas.




Quote: How lucky we are to live in this time   the first moment in human history   when we are in fact visiting other worlds. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

How lucky we are to live in this time the first moment in human history when we are in fact visiting other worlds.


Quote: It seems madness to say, 'We're worried that they're going to become addicted to marijuana' -- there's no evidence whatever that it's an addictive drug, but even if it were, these people are dying, what are we saving them from? by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

It seems madness to say, 'We're worried that they're going to become addicted to marijuana' -- there's no evidence whatever that it's an addictive drug, but even if it were, these people are dying, what are we saving them from?


Quote: Eratosthenes's only tools were sticks, eyes, feet, and brains; plus a zest for experiment. With those tools he correctly deduced the circumference of the Earth, to high precision, with an error of only a few percent. That's pretty good figuring for 2200 years ago. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Eratosthenes's only tools were sticks, eyes, feet, and brains; plus a zest for experiment. With those tools he correctly deduced the circumference of the Earth, to high precision, with an error of only a few percent. That's pretty good figuring for 2200 years ago.


Quote: We are the only species on the planet, so far as we know, to have invented a communal memory stored neither in our genes nor in our brains. The warehouse of this memory is called the library. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

We are the only species on the planet, so far as we know, to have invented a communal memory stored neither in our genes nor in our brains. The warehouse of this memory is called the library.


Quote: We on Earth have just awakened to the great oceans of space and time from which we have emerged. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

We on Earth have just awakened to the great oceans of space and time from which we have emerged.

Longer Version/[Notes]:

We on Earth have just awakened to the great oceans of space and time from which we have emerged. We are the legacy of 15 billion years of cosmic evolution. We have a choice: We can enhance life and come to know the universe that made us, or we can squander our 15 billion-year heritage in meaningless self-destruction. What happens in the first second of the next cosmic year depends on what we do, here and now, with our intelligence and our knowledge of the cosmos.


Quote: Societies will, of course, wish to exercise prudence in deciding which technologies that is, which applications of science are to be pursued and which not. But without funding basic research, without supporting the acquisition of knowledge for its own sake, our options become dangerously limited. by author Carl Sagan overlaid on photo of Carl Sagan quote: Societies will, of course, wish to exercise prudence in deciding which technologies that is, which applications of science are to be pursued and which not. But without funding basic research, without supporting the acquisition of knowledge for its own sake, our options become dangerously limited.- black text on quotes background

Societies will, of course, wish to exercise prudence in deciding which technologies that is, which applications of science are to be pursued and which not. But without funding basic research, without supporting the acquisition of knowledge for its own sake, our options become dangerously limited.


Quote: Knowing a great deal is not the same as being smart; intelligence is not information alone but also judgement, the manner in which information is coordinated and used. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Knowing a great deal is not the same as being smart; intelligence is not information alone but also judgement, the manner in which information is coordinated and used.


Quote: The boundary between space and the earth is purely arbitrary. And I'll probably always be interested in this planet -- it's my favorite. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The boundary between space and the earth is purely arbitrary. And I'll probably always be interested in this planet -- it's my favorite.


Quote: Few scientists now dispute that today's soaring levels of carbon dioxide and other gases in the atmosphere will cause global temperature averages to rise by as much as nine degrees Fahrenheit sometime after the year 2000. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Few scientists now dispute that today's soaring levels of carbon dioxide and other gases in the atmosphere will cause global temperature averages to rise by as much as nine degrees Fahrenheit sometime after the year 2000.


Quote: Our politics, economics, advertising, and religions (New Age and Old) are awash in credulity. Those who have something to sell, those who wish to influence public opinion, those in power, a skeptic might suggest, have a vested interest in discouraging skepticism,. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Our politics, economics, advertising, and religions (New Age and Old) are awash in credulity. Those who have something to sell, those who wish to influence public opinion, those in power, a skeptic might suggest, have a vested interest in discouraging skepticism,.


Quote: You probably don't need more weapons than what's required to destroy every city on earth. There's only 2,300 cities. So, the United States, by that criteria, only needs 2,300 nuclear weapons -- well, we've got more than 25,000! by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

You probably don't need more weapons than what's required to destroy every city on earth. There's only 2,300 cities. So, the United States, by that criteria, only needs 2,300 nuclear weapons -- well, we've got more than 25,000!


Quote: We are not without empathetic terror when we open Pascal's 'Pensees' and read, 'I am the great silent spaces between worlds.' by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

We are not without empathetic terror when we open Pascal's 'Pensees' and read, 'I am the great silent spaces between worlds.'


Quote: These days there seems to be nowhere left to explore, at least on the land area of the Earth. Victims of their very success, the explorers now pretty much stay home. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

These days there seems to be nowhere left to explore, at least on the land area of the Earth. Victims of their very success, the explorers now pretty much stay home.




Quote: Not all birds can fly. What separates the flyers from the walkers is the ability to take off. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Not all birds can fly. What separates the flyers from the walkers is the ability to take off.


Quote: First rule in government spending: why build one when you can have two at twice the price? by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

First rule in government spending: why build one when you can have two at twice the price?


Quote: One trend that bothers me is the glorification of stupidity, that the media is reassuring people it's alright not to know anything. That to me is far more dangerous than a little pornography on the Internet. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

One trend that bothers me is the glorification of stupidity, that the media is reassuring people it's alright not to know anything. That to me is far more dangerous than a little pornography on the Internet.




Quote: If we offer too much silent assent about mysticism and superstition -- even when it seems to be doing a little good -- we abet a general climate in which scepticism is considered impolite, science tiresome, and rigorous thinking somehow stuffy and inappropriate. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

If we offer too much silent assent about mysticism and superstition -- even when it seems to be doing a little good -- we abet a general climate in which scepticism is considered impolite, science tiresome, and rigorous thinking somehow stuffy and inappropriate.


Quote: It will not be we who reach Alpha Centauri, and the other nearby stars. It will be a species very like us -- but with more of our strengths and fewer of our weaknesses. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

It will not be we who reach Alpha Centauri, and the other nearby stars. It will be a species very like us -- but with more of our strengths and fewer of our weaknesses.


Quote: Our difficulties in understanding or effectuating
communication with other animals may arise from our reluctance to grasp unfamiliar ways of dealing with the world. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Our difficulties in understanding or effectuating
communication with other animals may arise from our reluctance to grasp unfamiliar ways of dealing with the world.


Quote: Human spoken language seems to be
adventitious. The exploitation of organ systems with other functions for communication in humans is also indicative of the comparatively recent evolution of our linguistic abilities. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Human spoken language seems to be
adventitious. The exploitation of organ systems with other functions for communication in humans is also indicative of the comparatively recent evolution of our linguistic abilities.


Quote: The cognitive abilities of chimpanzees force us, I think, to raise searching questions about the boundaries of the community of beings to which special ethical considerations are due. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

The cognitive abilities of chimpanzees force us, I think, to raise searching questions about the boundaries of the community of beings to which special ethical considerations are due.


Quote: Like other mammals, they are capable of strong emotions. They have certainly committed no crimes. I do not claim to have the answer, but I think it is
certainly worthwhile to raise the question: Why, exactly, all over the civilized world, in virtually every major city, are apes in prison? by author Carl Sagan overlaid on photo of Carl Sagan quote: Like other mammals, they are capable of strong emotions. They have certainly committed no crimes. I do not claim to have the answer, but I think it is
certainly worthwhile to raise the question: Why, exactly, all over the civilized world, in virtually every major city, are apes in prison?- black text on quotes background

Like other mammals, they are capable of strong emotions. They have certainly committed no crimes. I do not claim to have the answer, but I think it is
certainly worthwhile to raise the question: Why, exactly, all over the civilized world, in virtually every major city, are apes in prison?


Quote: It is said that men may not be the dreams of the god, but rather that the gods are the dreams of men. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

It is said that men may not be the dreams of the god, but rather that the gods are the dreams of men.


Quote: You're capable of such beautiful dreams and such horrible nightmares. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

You're capable of such beautiful dreams and such horrible nightmares.


Quote: Books tap the wisdom of our species -- the greatest minds, the best teachers -- from all over the world and from all our history. And they're patient. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Books tap the wisdom of our species -- the greatest minds, the best teachers -- from all over the world and from all our history. And they're patient.


Quote: Science is a way to call the bluff of those who only pretend to knowledge. It is a bulwark against mysticism, against superstition, against religion misapplied to where it has no business being. by author Carl Sagan overlaid on photo of photo of author Carl Sagan with quote

Science is a way to call the bluff of those who only pretend to knowledge. It is a bulwark against mysticism, against superstition, against religion misapplied to where it has no business being.




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