Carl Sagan Quotes, Heart Quotes, Tree Quotes

We humans look rather different from a tree. Without a doubt we perceive the world differently than a tree does. But down deep, at the molecular heart of life, the trees and we are essentially identical.

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Tags : Carl Sagan Quotes , Heart Quotes , Tree Quotes

Some racists still reject the plain testimony written in the DNA that all the races are not only human but nearly indistinguishable. . . .

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Tags : Carl Sagan Quotes , Life Quotes , Race Quotes

Eratosthenes's only tools were sticks, eyes, feet, and brains; plus a zest for experiment. With those tools he correctly deduced the circumference of the Earth, to high precision, with an error of only a few percent. That's pretty good figuring for 2200 years ago.

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Tags : Carl Sagan Quotes , Eye Quotes , Errors Quotes

Science cuts two ways, of course; its products can be used for both good and evil. But there's no turning back from science. The early warnings about technological dangers also come from science.

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Our ancestors lived out of doors. They were as familiar with the night sky as most of us are with our favorite television programs.

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As the ancient myth makers knew, we are children equally of the earth and the sky.

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Don't judge everyone else by your own limited experience.

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One glance at a book and you hear the voice of another person, perhaps someone dead for 1,000 years. To read is to voyage through time.

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Tags : Carl Sagan Quotes , Book Quotes , Years Quotes

We are star stuff harvesting sunlight.

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Tags : Carl Sagan Quotes , Stars Quotes , Stuff Quotes

National boundaries are not evident when we view the Earth from space. Fanatical ethnic or religious or national chauvinisms are a little difficult to maintain when we see our planet as a fragile blue crescent fading to become an inconspicuous point of light against the bastion and citadel of the stars.

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Tags : Carl Sagan Quotes , Religious Quotes , Stars Quotes

I went to the librarian and asked for a book about stars.... And the answer was stunning. It was that the Sun was a star but really close. The stars were suns, but so far away they were just little points of light.... The scale of the universe suddenly opened up to me. It was a kind of religious experience. There was a magnificence to it, a grandeur, a scale which has never left me. Never ever left me.

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Tags : Carl Sagan Quotes , Religious Quotes , Stars Quotes

For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this appealing idea. The extraordinary claims are not supported by extraordinary evidence.

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Tags : Carl Sagan Quotes , Civilization Quotes , Ideas Quotes

Our perceptions are fallible. We sometimes see what isn't there. We are prey to optical illusions. Occasionally we hallucinate. We are error-prone.

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Tags : Carl Sagan Quotes , Errors Quotes , Perception Quotes

For years I've been stressing with regard to UFOs that extraordinary claims require extraordinary evidence.

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Tags : Carl Sagan Quotes , Stress Quotes , Years Quotes

Scientists can routinely predict a solar eclipse, to the minute, a millennium in advance. You can go to the witch doctor to lift the spell that causes your pernicious anaemia, or you can take Vitamin B12. If you want to save your child from polio, you can pray or you can inoculate. If you're interested in the sex of your unborn child, you can consult plumb-bob danglers all you want . . . but they'll be right, on average, only one time in two. If you want real accuracy . . . try amniocentesis and sonograms. Try science.

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Tags : Carl Sagan Quotes , Sex Quotes , Children Quotes

Accommodation to change, the thoughtful pursuit of alternative futures are keys to the survival of civilization and perhaps of the human species.

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Tags : Carl Sagan Quotes , Thoughtful Quotes , Keys Quotes

Societies will, of course, wish to exercise prudence in deciding which technologies that is, which applications of science are to be pursued and which not. But without funding basic research, without supporting the acquisition of knowledge for its own sake, our options become dangerously limited.

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Tags : Carl Sagan Quotes , Exercise Quotes , Technology Quotes

The Cosmos is all that is or ever was or ever will be.

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In the deepest sense the search for extraterrestrial intelligence is a search for ourselves.

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Tags : Carl Sagan Quotes , Moon Quotes , Extraterrestrial Quotes

The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

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Tags : Carl Sagan Quotes , Wisdom Quotes , Understanding Quotes