Carl Sagan Quotes, Average Quotes, Years Quotes

Few scientists now dispute that today's soaring levels of carbon dioxide and other gases in the atmosphere will cause global temperature averages to rise by as much as nine degrees Fahrenheit sometime after the year 2000.

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Tags : Carl Sagan Quotes , Average Quotes , Years Quotes

Absolute certainty will always elude us. We will always be mired in error. The most each generation can hope for is to reduce the error. . . .

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Tags : Carl Sagan Quotes , Errors Quotes , Elude Us 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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Demon mean knowledge in Greek, especially about the material world. Science means knowledge in Latin. A jurisdictional dispute is exposed, even if we look no further

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Tags : Carl Sagan Quotes , Latin Quotes , Mean Quotes

I promise to question everything my leaders tell me. I promise to use my critical faculties. I promise to develop my independence of thought. I promise to educate myself so I can make my own judgments.

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Tags : Carl Sagan Quotes , Leader Quotes , Independence Quotes

The way to find out about our place in the universe is by examining the universe and by examining ourselves - without preconceptions, with as unbiased a mind as we can muster.

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Tags : Carl Sagan Quotes , Mind Quotes , Unbiased Quotes

What does it mean for a civilisation to be a million years old? We have had radio telescopes and spaceships for a few decades; our technical civilisation is a few hundred years old ... an advanced civilisation millions of years old is as much beyond us as we are beyond a bushbaby or a macaque

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If we continue to accumulate only power and not wisdom, we will surely destroy ourselves.

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We are the product of 4.5 billion years of fortuitous, slow biological evolution. There is no reason to think that the evolutionary process has stopped. Man is a transitional animal. He is not the climax of creation.

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Tags : Carl Sagan Quotes , Animal Quotes , Men Quotes

Advances in medicine and agriculture have saved vastly more lives than have been lost in all the wars in history.

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Tags : Carl Sagan Quotes , Atheist Quotes , War Quotes

We've arranged a civilization in which most crucial elements profoundly depend on science and technology.

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The method of science, as stodgy and grumpy as it may seem, is far more important than the findings of science.

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Tags : Carl Sagan Quotes , Pain Quotes , Important Quotes

One of the reasons for its success is that science has a built-in, error-correcting machinery at its very heart. Some may consider this an overbroad characterization, but to me every time we exercise self-criticism, every time we test our ideas against the outside world, we are doing science. When we are self-indulgent and uncritical, when we confuse hopes and facts, we slide into pseudoscience and superstition.

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Tags : Carl Sagan Quotes , Heart Quotes , Exercise Quotes

Discussing the possibilities of extraterrestrial life: I would love it even if they were short, sullen, grumpy and sexually obsessed. But there just isn't any good evidence.

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Tags : Carl Sagan Quotes , Life Quotes , Sullen Quotes

Once we overcome our fear of being tiny, we find ourselves on the threshold of a vast and awesome Universe that utterly dwarfs — in time, in space, and in potential — the tidy anthropocentric proscenium of our ancestors.

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Tags : Carl Sagan Quotes , Space Quotes , Overcoming Quotes

All over the world there are enormous numbers of smart, even gifted, people who harbor a passion for science. But that passion is unrequited. Surveys suggest that some 95% of Americans are "scientifically illiterate." That's...the same fraction...of slaves who were illiterate before the Civil War.

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Tags : Carl Sagan Quotes , War Quotes , Smart Quotes

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. Microbiology and meteorology now explain what only a few centuries ago was considered sufficient cause to burn women to death.

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Tags : Carl Sagan Quotes , Successful Quotes , Meteorology Quotes

The secrets of evolution are death and time-the deaths of enormous numbers of lifeforms that were imperfectly adapted to the environment; and time for a long succession of small mutations.

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Tags : Carl Sagan Quotes , Science Quotes , Numbers Quotes

There are in fact 100 billion galaxies, each of which contain something like a 100 billion stars. Think of how many stars, and planets, and kinds of life there may be in this vast and awesome universe.

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Tags : Carl Sagan Quotes , Stars Quotes , Thinking Quotes

Widespread intellectual and moral docility may be convenient for leaders in the short term, but it is suicidal for nations in the long term. One of the criteria for national leadership should therefore be a talent for understanding, encouraging, and making constructive use of vigorous criticism.

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Tags : Carl Sagan Quotes , Suicidal Quotes , Science Quotes