It would be wryly interesting if in human history the cultivation of marijuana led generally to the invention of agriculture, and thereby… — Carl Sagan Copy Share Image
We've arranged a civilization in which most crucial elements profoundly depend on science and technology. — Carl Sagan Copy Share Image
I think the health of our civilization, the depth of our awareness about the underpinnings of our culture, and our concern for… — Carl Sagan Copy Share Image
In the vastness of the Cosmos there must be other civilizations far older and more advanced than ours. — Carl Sagan Copy Share Image
I would be very ashamed of my civilization if we did not try to find out if there is life in outer… — 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
In the long run, the aggressive civilizations destroy themselves, almost always. It's their nature. They can't help it. — 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
“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
“We've arranged a global civilization in which most crucial elements profoundly depend on science and technology. We have also arranged things so… — Carl Sagan Copy Share Image
What a splendid perspective contact with a profoundly different civilization might provide! In a cosmic setting vast and old beyond ordinary human… — 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
“The chance of receiving a signal from a civilization exactly as advanced as we are should be minuscule. If they were even… — Carl Sagan Copy Share Image
A single message from space will show that it is possible to live through technological adolescence. . . . It is possible… — Carl Sagan Copy Share Image
The wind whips through the canyons of the American Southwest, and there is no one to hear it but us - a… — Carl Sagan Copy Share Image
Before we invented civilization our ancestors lived mainly in the open out under the sky. Before we devised artificial lights and atmospheric… — Carl Sagan Copy Share Image
As agonizing a disease as cancer is, I do not think it can be said that our civilization is threatened by it.… — 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… — Carl Sagan Copy Share Image
“Coal, oil and gas are called fossil fuels, because they are mostly made of the fossil remains of beings from long ago.… — Carl Sagan Copy Share Image
For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this… — Carl Sagan Copy Share Image
“We have designed our civilization based on science and technology and at the same time arranged things so that almost no one… — Carl Sagan Copy Share Image
What does it mean for a civilisation to be a million years old? We have had radio telescopes and spaceships for a… — 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
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
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
“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
“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
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
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
“[ 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
“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
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
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
Any sufficiently crisp question can be answered by a single binary digit-0 or 1, yes or no. — Carl Sagan Copy Share
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
