Carl Sagan Quotes

Haldane imagined a far future when the stars have darkened and space is mainly filled with a cold thin gas. Nevertheless, if we wait long enough statistical fluctuations in the density of this gas will occur. Over immense periods of time the fluctuations will be sufficient to reconstitute a Universe something like our own. If the Universe is infinitely old, there will be an infinite number of such reconstitutions, Haldane pointed out.

Our species has discovered a way to communicate through the dark, to transcend immense distances. No means of communication is faster or cheaper or reaches out farther. It’s called radio.

Every now and then, I’m lucky enough to teach a kindergarten or first-grade class. Many of these children are natural-born scientists — although heavy on the wonder side and light on skepticism. They’re curious, intellectually vigorous. Provocative and insightful questions bubble out of them. They exhibit enormous enthusiasm. I’m asked follow-up questions. They’ve never heard of the notion of a “dumb question.” But when I talk to high school seniors, I find something different. They memorize “facts.” By and large, though, the joy of discovery, the life behind those facts, has gone out of them. They’ve lost much of the wonder, and gained very little skepticism. They’re worried about asking “dumb” questions; they’re willing to accept inadequate answers; they don’t pose follow-up questions; the room is awash with sidelong glances to judge, second-by-second, the approval of their peers. They come to class with their questions written out on pieces of paper, which they surreptitiously examine, waiting their turn and oblivious of whatever discussion their peers are at this moment engaged in. Something has happened between first and twelfth grade, and it’s not just puberty. I’d guess that it’s partly peer pressure not to excel (except in sports); partly that the society teaches short-term gratification; partly the impression that science or mathematics won’t buy you a sports car; partly that so little is expected of students; and partly that there are few rewards or role models for intelligent discussion of science and technology — or even for learning for its own sake. Those few who remain interested are vilified as “nerds” or “geeks” or “grinds.

"Even if we ourselves are not personally scandalized by the notion of other animals as close relatives, even if our age has accommodated to the idea, the passionate resistance of so many of us, in so many epochs and cultures, and by so many distinguished scholars, must say something important about us. What can we learn about ourselves from an apparent error so widespread, propagated by so many leading philosophers and scientists, both ancient and modern, with such assurance and self-satisfaction?

One of several possible answers: A sharp distinction between humans and "animals" is essential if we are to bend them to our will, make them work for us, wear them, eat them — without any disquieting tinges of guilt or regret. With untroubled consciences, we can render whole species extinct — for our perceived short-term benefit, or even through simple carelessness. Their loss is of little import: Those beings, we tell ourselves, are not like us. An unbridgeable gap gas thus a practical role to play beyond the mere stroking of human egos. Darwin's formulation of this answer was: "Animals whom we have made our slaves, we do not like to consider our equals.

Science is generated by and devoted to free inquiry: the idea that any hypothesis, no matter how strange, deserves to be considered on its merits. The suppression of uncomfortable ideas may be common in religion and politics, but it is not the path to knowledge; it has no place in the endeavor of science. We do not know in advance who will discover fundamental new insights.

I have a foreboding of an America in my children's or grandchildren's time — when the United States is a service and information economy; when nearly all the manufacturing industries have slipped away to other countries; when awesome technological powers are in the hands of a very few, and no one representing the public interest can even grasp the issues; when the people have lost the ability to set their own agendas or knowledgeably question those in authority; when, clutching our crystals and nervously consulting our horoscopes, our critical faculties in decline, unable to distinguish between what feels good and what's true, we slide, almost without noticing, back into superstition and darkness...

La Unión Soviética se anexionó por la fuerza Letonia, Lituania, Estonia y partes de Finlandia, Polonia y Rumania; ocupó y sometió a un régimen comunista a Polonia, Rumania, Hungría, Mongolia, Bulgaria, Checoslovaquia, Alemania oriental y Afganistán, y sofocó el alzamiento de los obreros de Alemania oriental en 1953, la revolución húngara de 1956 y la tentativa checa de introducir en 1968 el glasnost y la perestroika. Dejando aparte las guerras mundiales y las expediciones para combatir la piratería o el tráfico de esclavos, Estados Unidos ha perpetrado invasiones e intervenciones armadas en otros países en más de 130 ocasiones*, incluyendo China (18 veces), México (13), Nicaragua y Panamá (9 cada uno), Honduras (7), Colombia y Turquía (6 en cada país), República Dominicana, Corea y Japón (5 cada uno), Argentina, Cuba, Haití, el reino de Hawai y Samoa (4 cada uno), Uruguay y Fiji (3 cada uno), Granada, Puerto Rico, Brasil, Chile, Marruecos, Egipto, Costa de Marfil, Siria, Irak, Perú, Formosa, Filipinas, Camboya, Laos y Vietnam. La mayoría de estas incursiones han sido escaramuzas para mantener gobiernos sumisos o proteger propiedades e intereses de empresas estadounidenses, pero algunas han sido mucho más importantes, prolongadas y cruentas.

* Esta lista, que suscitó una cierta sorpresa cuando fue publicada en Estados Unidos, se basa en recopilaciones de la Comisión de fuerzas armadas de la cámara de representantes.

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.

Even after 400 generations in villages and cities, we haven't forgotten. The open road still softly calls, like a nearly forgotten song of childhood.

Science cuts two ways, of course; its products can be used for both good and evil. But there's no turning back from science.

There are no forbidden questions in science, no matters to sensitive or delicate to be probed, no sacred truths. That openness to new ideas, combined with the most rigorous, skeptical scrutiny of all ideas, sifts the wheat from the chaff. It makes no difference how smart, august, or beloved you are. You must prove your case in the face of determined, expert criticism. Diversity and debate are valued. Opinions are encouraged to contend–substantively and in depth.

And because what we are doing is so horrifying, we tend not to think of it much.

Exploration is in our nature. We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.

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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