All civilizations become either spacefaring or extinct.
CARL SAGANNot all birds can fly. What separates the flyers from the walkers is the ability to take off.
More Carl Sagan Quotes
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Writing is the greatest of human inventions, binding together people, citizens of distant epochs, who never knew one another.
CARL SAGAN -
Not all birds can fly. What separates the flyers from the walkers is the ability to take off.
CARL SAGAN -
Extraordinary claims require extraordinary evidence.
CARL SAGAN -
If I finish a book a week, I will read only a few thousand books in my lifetime, about a tenth of a percent of the contents of the greatest libraries of our time. The trick is to know which books to read.
CARL SAGAN -
Our ancestors lived out of doors. They were as familiar with the night sky as most of us are with our favorite television programs.
CARL SAGAN -
If you wish to make an apple pie from scratch, you must first invent the universe.
CARL SAGAN -
Science is not only compatible with spirituality; it is a profound source of spirituality.
CARL SAGAN -
Science is an attempt, largely successful, to understand the world, to get a grip on things, to get hold of ourselves, to steer a safe course.
CARL SAGAN -
Writing is the greatest of human inventions, binding together people, citizens of distant epochs, who never knew one another.
CARL SAGAN -
Be grateful everyday for the brief but magnificent opportunity that life provides.
CARL SAGAN -
We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.
CARL SAGAN -
You have to know the past to understand the present.
CARL SAGAN -
Across the sea of space, the stars are other suns.
CARL SAGAN -
The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.
CARL SAGAN -
We are star stuff which has taken its destiny into its own hands.
CARL SAGAN







