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
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
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
The claim is also sometimes made that science is as arbitrary or irrational as all other claims to knowledge, or that reason… — Carl Sagan Copy Share Image
What counts is not what sounds plausible, not what we would like to believe, not what one or two witnesses claim, but… — Carl Sagan Copy Share Image
For years I've been stressing with regard to UFOs that extraordinary claims require extraordinary evidence. — Carl Sagan Copy Share Image
Is it fair to be suspicious of an entire profession because of a few bad apples? There are at least two important… — Carl Sagan Copy Share Image
I believe that the extraordinary should be pursued. But extraordinary claims require extraordinary evidence. — Carl Sagan Copy Share Image
Science ... looks skeptically at all claims to knowledge, old and new. It teaches not blind obedience to those in authority but… — 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
