We are the first species to have taken our evolution into our own hands. — Carl Sagan Copy Share Image
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. — Carl Sagan Copy Share Image
Curiosity and the urge to solve problems are the emotional hallmarks of our species ... — Carl Sagan Copy Share Image
We have heard the rationales offered by the nuclear superpowers. We know who speaks for the nations. But who speaks for the… — Carl Sagan Copy Share Image
Since, in the long run, every planetary society will be endangered by impacts from space, every surviving civilization is obliged to become… — Carl Sagan Copy Share Image
Virtually every major technological advance in the history of the human species - back to the invention of stone tools and the… — Carl Sagan Copy Share Image
We are an intelligent species and the use of our intelligence quite properly gives us pleasure. In this respect the brain is… — 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… — Carl Sagan Copy Share Image
We are the only species on the planet, so far as we know, to have invented a communal memory stored neither in… — Carl Sagan Copy Share Image
Ask courageous questions. Do not be satisfied with superficial answers. Be open to wonder and at the same time subject all claims… — Carl Sagan Copy Share Image
Books tap the wisdom of our species -- the greatest minds, the best teachers -- from all over the world and from… — Carl Sagan Copy Share Image
Since, in the long run, every planetary civilization will be endangered by impacts from space, every surviving civilization is obliged to become… — 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
There are many other (besides testosterone) behaviour-eliciting hormones fundamental for humen well-being, including estrogen and progesterone in females. The fact that complex… — Carl Sagan Copy Share Image
We seem, these days, much more willing to recognize the perils before us than we were even a decade ago. The newly… — Carl Sagan Copy Share Image
We invest far off places with a certain romance... Long summers, mild winters, rich harvests, plentiful game; none of them lasts for… — Carl Sagan Copy Share Image
By exploring other worlds we safeguard this one. By itself, I think this fact more than justifies the money our species has… — Carl Sagan Copy Share Image
“The Earth is the only world known so far to harbour life. There is nowhere else, at least in the near future,… — 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
My deeply held belief is that if a god of anything like the traditional sort exists, our curiosity and intelligence are provided… — Carl Sagan Copy Share Image
If our long-term survival is at stake, we have a basic responsibility to our species to venture to other worlds. Sailors on… — Carl Sagan Copy Share Image
We are at a crossroads in human history. Never before has there been a moment so simultaneously perilous and promising. We are… — Carl Sagan Copy Share Image
Accommodation to change, the thoughtful pursuit of alternative futures are keys to the survival of civilization and perhaps of the human species. — Carl Sagan Copy Share Image
Because men, compared to male chimps, have such relatively small testicles (large testicles indicate a species where many males mate, one after… — Carl Sagan Copy Share Image
It will not be we who reach Alpha Centauri, and the other nearby stars. It will be a species very like us… — Carl Sagan Copy Share Image
The library connects us with the insight and knowledge, painfully extracted from Nature, of the greatest minds that ever were, with the… — Carl Sagan Copy Share Image
What distinguishes our species is thought. The cerebral cortex is in a way a liberation. We need no longer be trapped in… — Carl Sagan Copy Share Image
You're an interesting species. An interesting mix. You're capable of such beautiful dreams, and such horrible nightmares. You feel so lost, so… — 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
![“[ 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)
