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Carl Sagan Quote - All civilizations become either spacefaring or extinct.

All civilizations become either spacefaring or extinct.

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Civilization Extinct Science Space

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Marilyn Monroe Paulo Coelho Abraham Lincoln C. S. Lewis Khalil Gibran Charlie Chaplin Gautama Buddha Isaac Newton

There are as many atoms in one molecule of DNA as there are stars in a typical galaxy.
CARL SAGAN

Atom DNA Galaxy Molecule Science Stars Typical
We are like butterflies who flutter for a day and think it is forever.
CARL SAGAN

Butterfly Forever Human Nature Thinking
Writing is the greatest of human inventions, binding together people, citizens of distant epochs, who never knew one another.
CARL SAGAN

Blind Citizen Distant Greatness Human Invention People Togetherness Writing
Except in pure mathematics, nothing is known for certain (although much is certainly false).
CARL SAGAN

Certain Except False Mathematics Pure
I think the health of our civilization, the depth of our awareness about the underpinnings of our culture and our concern for the future can all be tested by how well we support our libraries.
CARL SAGAN

Awareness Book Civilization Concern Culture Depth Future Health Library Test
Across the sea of space, the stars are other suns.
CARL SAGAN

Across Sea Space Stars Sun
One of the great commandments of science is: Mistrust arguments from authority.
CARL SAGAN

Argument Authority Command Greatness Science Trust
The absence of evidence is not evidence of absence.
CARL SAGAN

Absence Evidence One Liner
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

Apple Blood Calcium DNA Interior Nitrogen Stars Teeth
We are all stardust.
CARL SAGAN

One Liner Stardust
We are star stuff which has taken its destiny into its own hands.
CARL SAGAN

Destiny Hands Science Stars Stuff
The cure for a fallacious argument is a better argument, not the suppression of ideas.
CARL SAGAN

Argument Cure Ideas Suppression
For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.
CARL SAGAN

Assure Delusion Grasp Persistence Satisfaction Universe
Advances in medicine and agriculture have saved vastly more lives than have been lost in all the wars in history.
CARL SAGAN

Advance Agriculture History Live Lost Medicine Save Science Vast War
Science is not only compatible with spirituality; it is a profound source of spirituality.
CARL SAGAN

Compatible Profound Science Soource Spiritual
One of the greatest gifts adults can give – to their offspring and to their society – is to read to children.
CARL SAGAN

Adult Children Gift Reading Society Spring

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