I believe that the extraordinary should be pursued. But extraordinary claims require extraordinary evidence. — Carl Sagan Copy Share Image
An atheist is someone who is certain that God does not exist, someone who has compelling evidence against the existence of God.… — Carl Sagan Copy Share Image
You can't convince a believer of anything; for their belief is not based on evidence, it's based on a deep seated need… — Carl Sagan Copy Share Image
The neurochemistry of the brain is astonishingly busy, the circuitry of a machine more wonderful than any devised by humans. But there… — Carl Sagan Copy Share Image
Extraordinary observations require extraordinary evidence to make them believable. — Carl Sagan Copy Share Image
Discussing the possibilities of extraterrestrial life: I would love it even if they were short, sullen, grumpy and sexually obsessed. But there… — Carl Sagan Copy Share Image
In college, in the early 1950s, I began to learn a little about how science works, the secrets of its great success,… — Carl Sagan Copy Share Image
One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of… — 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
