Carl Sagan Quotes, Science Quotes, Doe Quotes

The notion that science and spirituality are somehow mutually exclusive does a disservice to both.

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Maxwell's Equations have had a greater impact on human history than any ten presidents.

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At a few hundred kilometers altitude, the Earth fills half your sky, and the band of blue that stretches from Mindanao to Bombay, which your eye encompasses in a single glance, can break your heart with its beauty. Home you think. Home. This is my world. This is where I come from. Everyone I know, everyone I ever heard of, grew up down there, under that relentless and exquisite blue.

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But, Jefferson worried that the people - and the argument goes back to Thucydides and Aristotle - are easily misled. He also stressed, passionately and repeatedly, that it was essential for the people to understand the risks and benefits of government, to educate themselves, and to involve themselves in the political process. Without that, he said, the wolves will take over.

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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

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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Extraordinary claims demand extraordinary evidence

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

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On the day that we do discover that we are not alone, our society may begin to evolve and transform in some incredible and wondrous new ways.

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Ours is the first generation that has grown up with science-fiction ideas.

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I think the discomfort that some people feel in going to the monkey cages at the zoo is a warning sign.

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To read is to voyage through time.

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There are wonders enough out there without our inventing any.

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Stars are phoenixes, rising from their own ashes.

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But down deep, at the molecular heart of life we're essentially identical to trees.

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We are star stuff which has taken its destiny into its own hands. The loom of time and space works the most astonishing transformations of matter.

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Before we invented civilization our ancestors lived mainly in the open out under the sky. Before we devised artificial lights and atmospheric pollution and modern forms of nocturnal entertainment we watched the stars. There were practical calendar reasons of course but there was more to it than that. Even today the most jaded city dweller can be unexpectedly moved upon encountering a clear night sky studded with thousands of twinkling stars. When it happens to me after all these years it still takes my breath away.

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We can judge our progress by the courage of our questions and the depth of our answers, our willingness to embrace what is true rather than what feels good.

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Science ... looks skeptically at all claims to knowledge, old and new. It teaches not blind obedience to those in authority but to vigorous debate, and in many respects that's the secret of its success.

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We are at a crossroads in human history. Never before has there been a moment so simultaneously perilous and promising. We are the first species to have taken evolution into our own hands.

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