If the greenhouse effect is a blanket in which we wrap ourselves to keep warm, nuclear winter kicks the blanket off. — Carl Sagan Copy Share Image
The Big Bang is our modern scientific creation myth. It comes from the same human need to solve the cosmological riddle [Where… — Carl Sagan Copy Share Image
“Demon” means “knowledge” in Greek. “Science” means “knowledge” in Latin. A jurisdictional dispute is exposed, even if we look no further.” — Carl Sagan Copy Share Image
I hold that popularization of science is successful if, at first, it does no more than spark the sense of wonder. — Carl Sagan Copy Share Image
Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense. — Carl Sagan Copy Share Image
Modern science has been a voyage into the unknown, with a lesson in humility waiting at every stop. Many passengers would rather… — Carl Sagan Copy Share Image
“The same few dozen organic molecules are used over and over again in biology for the widest variety of functions.” — Carl Sagan Copy Share Image
The usual rejoinder to someone who says 'They laughed at Columbus, they laughed at Galileo' is to say 'But they also laughed… — Carl Sagan Copy Share Image
A central lesson of science is that to understand complex issues (or even simple ones), we must try to free our minds… — Carl Sagan Copy Share Image
A new consciousness is developing which sees the earth as a single organism and recognizes that an organism at war with itself… — Carl Sagan Copy Share Image
Few scientists now dispute that today's soaring levels of carbon dioxide and other gases in the atmosphere will cause global temperature averages… — Carl Sagan Copy Share Image
The idea that God is an oversized white male with a flowing beard, who sits in the sky and tallies the fall… — Carl Sagan Copy Share Image
We need to reduce military budgets; raise living standards; engender respect for learning; support science, scholarship, invention, and industry; promote free inquiry;… — Carl Sagan Copy Share Image
“More recently, books, especially paperbacks, have been printed in massive and inexpensive editions. For the price of a modest meal you can… — Carl Sagan Copy Share Image
“We've arranged a civilization in which most crucial elements profoundly depend on science and technology. We have also arranged things so that… — Carl Sagan Copy Share Image
Widespread intellectual and moral docility may be convenient for leaders in the short term, but it is suicidal for nations in the… — Carl Sagan Copy Share Image
Imagine a room awash in gasoline, and there are two implacable enemies in that room. One of them has nine thousand matches.… — Carl Sagan Copy Share Image
How is it that hardly any major religion has looked at science and concluded, “This is better than we thought! The Universe… — Carl Sagan Copy Share Image
Science and mathematics [are] much more compelling and exciting than the doctrines of pseudoscience, whose practitioners were condemned as early as the… — Carl Sagan Copy Share Image
“Humans may crave absolute certainty; they may aspire to it; they may pretend, as partisans of certain religions do, to have attained… — Carl Sagan Copy Share Image
“Science arouses a soaring sense of wonder. But so does pseudoscience. Sparse and poor popularizations of science abandon ecological niches that pseudoscience… — Carl Sagan Copy Share Image
If we can't think for ourselves, if we're unwilling to question authority, then we're just putty in the hands of those in… — Carl Sagan Copy Share Image
“Then science came along and taught us that we are not the measure of all things, that there are wonders unimagined, that… — Carl Sagan Copy Share Image
“Science is more than a body of knowledge. It is a way of thinking; a way of skeptically interrogating the universe with… — Carl Sagan Copy Share Image
The fact that so little of the findings of modern science is prefigured in Scripture to my mind casts further doubt on… — Carl Sagan Copy Share Image
If we offer too much silent assent about mysticism and superstition - even when it seems to be doing a little good… — Carl Sagan Copy Share Image
“Science is not only compatible with spirituality; it is a profound source of spirituality. When we recognize our place in an immensity… — Carl Sagan Copy Share Image
“It may be that there are kernels of truth in a few of these doctrines, but their widespread acceptance betokens a lack… — Carl Sagan Copy Share Image
“It is certainly true that all beliefs and all myths are worthy of a respectful hearing. It is not true that all… — Carl Sagan Copy Share Image
“Science is generated by and devoted to free inquiry: the idea that any hypothesis, no matter how strange, deserves to be considered… — Carl Sagan Copy Share Image
I maintain there is much more wonder in science than in pseudoscience. And in addition, to whatever measure this term has any… — Carl Sagan Copy Share Image
There is no other species on Earth that does science. It is, so far, entirely a human invention, evolved by natural selection… — Carl Sagan Copy Share Image
When a honeybee dies it releases a death pheromone, a characteristic odour that signals the survivors to remove it from the hive.… — Carl Sagan Copy Share Image
“Once we lose our fear of being tiny, we find ourselves on the threshold of a vast and awesome Universe which dwarfs… — Carl Sagan Copy Share Image
“The astonishing fact is that similar mathematics applies so well to planets and to clocks. It needn’t have been this way. We… — Carl Sagan Copy Share Image
There are many hypotheses in physics of almost comparable brillance and elegance that have been rejected because they did not survive such… — Carl Sagan Copy Share Image
“Huygens was, of course, a citizen of his time. Who of us is not? He claimed science as his religion and then… — Carl Sagan Copy Share Image
Philosophers and scientists confidently offer up traits said to be uniquely human, and the monkeys and apes casually knock them down --… — Carl Sagan Copy Share Image
“The Apollo pictures of the whole Earth conveyed to multitudes something well known to astronomers: On the scale of the worlds -… — Carl Sagan Copy Share Image
Science is an attempt, largely successful, to understand the world, to get a grip on things, to get hold of ourselves, to… — Carl Sagan Copy Share Image
It is sometimes said that scientists are unromantic, that their passion to figure out robs the world of beauty and mystery. But is it… — Carl Sagan Copy Share Image
The prediction of nuclear winter is drawn not, of course, from any direct experience with the consequences of global nuclear war, but rather from… — Carl Sagan Copy Share Image
The suppression of uncomfortable ideas may be common in religion or in politics, but it is not the path to knowledge; it has no… — Carl Sagan Copy Share Image
“Telepathy’ literally means to feel at a distance, just as ‘telephone’ is to hear at a distance and ‘television’ is to see at a… — Carl Sagan Copy Share Image
“On the scale of worlds—to say nothing of stars or galaxies—humans are inconsequential, a thin film of life on an obscure and solitary lump… — Carl Sagan Copy Share Image
Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies,… — Carl Sagan Copy Share Image
In our time, we have sifted the sands of Mars, we have established a presence there, we have fulfilled a century of dreams! — Carl Sagan Copy Share Image
“[ When a religious couple wrote to Sagan about fulfilled prophecies, he wrote back in May 1996 :] If ‘fulfilled prophecy’ is your criterion,… — Carl Sagan Copy Share Image
“Books permit us to voyage through time, to tap the wisdom of our ancestors. The library connects us with the insight and knowledge, painfully… — Carl Sagan Copy Share Image
We live on a hunk of rock and metal that circles a humdrum star that is one of 400 billion other stars that make… — Carl Sagan Copy Share Image
A tiny blue dot set in a sunbeam. Here it is. That's where we live. That's home. We humans are one species and this… — Carl Sagan Copy Share Image
Any sufficiently crisp question can be answered by a single binary digit-0 or 1, yes or no. — Carl Sagan Copy Share Image
Humans — who enslave, castrate, experiment on, and fillet other animals — have had an understandable penchant for pretending animals do not feel pain.… — Carl Sagan Copy Share Image
![“The Big Bang is our modern scientific creation myth. It comes from the same human need to solve the cosmological riddle [Where did the universe come from?]” quote by Carl Sagan](https://sms4smile.com/quotes/img-quotes/18f/carl-sagan-160_bangs_the-big-bang-is-our-modern-scientific-cr_1428069.jpg)
![“Science and mathematics [are] much more compelling and exciting than the doctrines of pseudoscience, whose practitioners were condemned as early as the fifth century B.C. by the Ionian philosopher Heraclitus as 'night walkers, magicians, priests of Bacchus, priestesses of the wine-vat…” quote by Carl Sagan](https://sms4smile.com/quotes/img-quotes/3e2/carl-sagan-160_bacchus_science-and-mathematics-are-much-more-co_2332206.jpg)
![“[ When a religious couple wrote to Sagan about fulfilled prophecies, he wrote back in May 1996 :] If ‘fulfilled prophecy’ is your criterion, why do you not believe in materialistic science, which has an unparalleled record of fulfilled prophecy? Consider, for example, eclipses.” quote by Carl Sagan](https://sms4smile.com/quotes/img-quotes/875/carl-sagan-160_belief_when-a-religious-couple-wrote-to-sagan-a_25095.jpg)
