The prediction of nuclear winter is drawn not, of course, from any direct experience with the consequences of global nuclear war, but… — Carl Sagan Copy Share Image
“The laws of nature cannot be randomly reshuffled at the cusps [of an oscillating universe]. If the universe has already gone through… — Carl Sagan Copy Share Image
“In the 1920s, there was a dinner at which the physicist Robert W. Wood was asked to respond to a toast ...… — Carl Sagan Copy Share Image
We live in an in-between universe where things change all right...but according to patterns, rules, or as we call them, laws of… — Carl Sagan Copy Share Image
“Science is based on experiment, on a willingness to challenge old dogma, on an openness to see the universe as it really… — Carl Sagan Copy Share Image
The difference between physics and metaphysics is not that the practitioners of one are smarter than the practitioners of the other. The… — 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
Science is more than a body of knowledge. It's a way of thinking: a way of skeptically interrogating the universe. — Carl Sagan Copy Share Image
In science it often happens that scientists say, "You know that's a really good argument; my position is mistaken..." — Carl Sagan Copy Share Image
“There is something stunningly narrow about how the Anthropic Principle is phrased. Yes, only certain laws and constants of nature are consistent… — Carl Sagan Copy Share Image
A multitude of aspects of the natural world that were considered miraculous only a few generations ago are now thoroughly understood in… — Carl Sagan Copy Share Image
Goddard represented a unique combination of visionary dedication and technological brilliance. He studied physics because he needed physics to get to Mars.… — Carl Sagan Copy Share Image
In a lot of scientists, the ratio of wonder to skepticism declines in time. That may be connected with the fact that… — Carl Sagan Copy Share Image
“The study of the galaxies reveals a universal order and beauty. It also shows us chaotic violence on a scale hitherto undreamed… — Carl Sagan Copy Share Image
“We inhabit a universe where atoms are made in the centers of stars; where each second a thousand suns are born; where… — 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
