Is mankind alone in the universe? Or are there somewhere other intelligent beings looking up into their night sky from very different… — Carl Sagan Copy Share Image
By looking far out into space we are also looking far back into time, back toward the horizon of the universe, back… — Carl Sagan Copy Share Image
“The astonishing fact is that similar mathematics applies so well to planets and to clocks. It needn’t have been this way. We… — Carl Sagan Copy Share Image
I believe that even a smattering of such findings in modern science and mathematics is far more compelling and exciting than most… — Carl Sagan Copy Share Image
“There is a place with four suns in the sky-red, white, blue, and yellow; two of them are so close together that… — 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
Every aspect of Nature reveals a deep mystery and touches our sense of wonder and awe. Those afraid of the universe as… — Carl Sagan Copy Share Image
The cosmic calendar compresses the local history of the universe into a single year. If the universe began on January 1st it… — 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
