Scientists can routinely predict a solar eclipse, to the minute, a millennium in advance. You can go to the witch doctor to… — 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
The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together.… — Carl Sagan Copy Share Image
If we are not able to ask skeptical questions, to interrogate those who tell us that something is true, to be skeptical… — 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 is provided… — Carl Sagan Copy Share Image
Who are we, if not measured by our impact on others? That’s who we are! We’re not who we say we are,… — Carl Sagan Copy Share Image
If we could travel into the past, it's mind-boggling what would be possible. For one thing, history would become an experimental science,… — Carl Sagan Copy Share Image
We are rare and precious because we are alive, because we can think as well as we can. We are privileged to… — Carl Sagan Copy Share Image
(When asked merely if they accept evolution, 45 percent of Americans say yes. The figure is 70 percent in China.) When the… — Carl Sagan Copy Share Image
If we do not speak for Earth, who will? If we are not committed to our own survival, who will be? — Carl Sagan Copy Share Image
If we say that God has always been, why not save a step and conclude that the universe has always been? — Carl Sagan Copy Share Image
If you are only skeptical, then no new ideas make it through to you. You become a crotchety old person convinced that… — Carl Sagan Copy Share Image
If you look at Earth from space you see a dot, that's here. That's home. That's us. It underscores the responsibility to… — Carl Sagan Copy Share Image
'In his celebrated book, 'On Liberty', the English philosopher John Stuart Mill argued that silencing an opinion is "a peculiar evil." If… — Carl Sagan Copy Share Image
Where did God come from? If we decide this is an unanswerable question why not save a step and conclude that the… — Carl Sagan Copy Share Image
In many cultures it is customary to answer that God created the universe out of nothing. But this is mere temporizing. If… — 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
Indeed the reasoned criticism of a prevailing belief is a service to the proponents of that belief; if they are incapable of… — Carl Sagan Copy Share Image
If the constellations had been named in the twentieth century, I suppose we would see bicycles and refrigerators in the sky. — Carl Sagan Copy Share Image
When you buy a used car, you kick the tires, you look at the odometer, you open up the hood. If you… — Carl Sagan Copy Share Image
Better by far to embrace the hard truth than a reassuring fable. If we crave some cosmic purpose, then let us find… — 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
The very act of understanding is a celebration of joining, merging, even if on a very modest scale, with the magnificence of… — Carl Sagan Copy Share Image
In Mozambique, the story goes, monkeys do not talk, because they know if they utter even a single word some man will… — Carl Sagan Copy Share Image
If you want to make a [rhubarb] pie from scratch, first you have to create the universe. — 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
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