We live in a society exquisitely dependent on science and technology

“We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.”

~Carl Sagan
Imagination will often carry us to worlds that never were. But without it we go nowhere.

“Imagination will often carry us to worlds that never were. But without it we go nowhere.”

~Carl Sagan
All civilizations become either spacefaring or extinct.

“All civilizations become either spacefaring or extinct.”

~Carl Sagan
The universe is a pretty big place. If it's just us, seems like an awful waste of space.

“The universe is a pretty big place. If it's just us, seems like an awful waste of space.”

~Carl Sagan
I don't want to believe. I want to know.

“I don't want to believe. I want to know.”

~Carl Sagan
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“Anything else you're interested in is not going to happen if you can't breathe the air and drink the water. Don't sit this one out. Do something. You are by accident of fate alive at an absolutely critical moment in the history of our planet.”

~Carl Sagan

“Our ancestors worshipped the Sun, and they were not that foolish. It makes sense to revere the Sun and the stars, for we are their children.”

~Carl Sagan

“The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.”

~Carl Sagan

"What an astonishing thing a book is. It's a flat object made from a tree with flexible parts on which are imprinted lots of funny dark squiggles. But one glance at it and you're inside the mind of another person, maybe somebody dead for thousands of years. Across the millennia, an author is speaking clearly and silently inside your head, directly to you. Writing is perhaps the greatest of human inventions, binding together people who never knew each other, citizens of distant epochs. Books break the shackles of time. A book is proof that humans are capable of working magic."

~Carl Sagan

“The nuclear arms race is like two sworn enemies standing waist deep in gasoline, one with three matches, the other with five.”

~Carl Sagan

“The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together.”

~Carl Sagan

“But down deep, at the molecular heart of life, the trees and we are essentially identical.”

~Carl Sagan

"The cosmos is also within us, we’re made of star stuff. We are a way for the cosmos to know itself."

~Carl Sagan

“Not explaining science seems to me perverse. When you're in love, you want to tell the world.”

~Carl Sagan

"These are some of the things that hydrogen atoms do given fifteen billion years of cosmic evolution.”

~ Carl Sagan