There is no other species on Earth that does science. It is, so far, entirely a human invention, evolved by natural selection… — Carl Sagan Copy Share Image
“But if humans can make new varieties of plants and animals, must not nature do so also? This related process is called… — Carl Sagan Copy Share Image
“Natural selection has served as a kind of intellectual sieve, producing brains and intelligences increasingly competent to deal with the laws of… — Carl Sagan Copy Share Image
Every cell is a triumph of natural selection, and we’re made of trillions of cells. Within us, is a little universe. — Carl Sagan Copy Share Image
“Naive Darwinists, including many capitalists, have self-servingly argued that oppression of the weak and the poor is a justified application of natural… — Carl Sagan Copy Share Image
“Fireflies out on a warm summer's night, seeing the urgent, flashing, yellow-white phosphorescence below them, go crazy with desire; moths cast to… — Carl Sagan Copy Share Image
“If artificial selection can make such major changes in so short a period of time, what must natural selection, working over billions… — Carl Sagan Copy Share Image
“In less than ten thousand years, domestication has increased the weight of wool grown by sheep from less than one kilogram of… — Carl Sagan Copy Share Image
“If we continue to accumulate only power and not wisdom, we will surely destroy ourselves. Our very existence in that distant time… — 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
