Carl Sagan Quotes

The lifetime of a human being is measured by decades, the lifetime of the Sun is a hundred million times longer. Compared to a star, we are like mayflies, fleeting ephemeral creatures who live out their lives in the course of a single day.

One of the great commandments of science is, 'Mistrust arguments from authority'. (Scientists, being primates, and thus given to dominance hierarchies, of course do not always follow this commandment.)

Cutting off fundamental, curiosity-driven science is like eating the seed corn. We may have a little more to eat next winter, but what will we plant so we and our children will have enough to get through the winters to come?

If you wish to make an apple pie from scratch, you must first invent the universe

Nós criamos uma civilização global em que os elementos mais cruciais — o transporte, as comunicações e todas as outras indústrias, a agricultura, a medicina, a educação, o entretenimento, a proteção ao meio ambiente e até a importante instituição democrática do voto — dependem profundamente da ciência e da tecnologia. Também criamos uma ordem em que quase ninguém compreende a ciência e a tecnologia. É uma receita para o desastre. Podemos escapar ilesos por algum tempo, porém mais cedo ou mais tarde essa mistura inflamável de ignorância e poder vai explodir na nossa cara.

The secrets of evolution, are time and death.

There's an unbroken thread that stretches from those first cells to us.

Pseudoscience is just the opposite. Hypotheses are often framed precisely so they are invulnerable to any experiment that offers a prospect of disproof, so even in principle they cannot be invalidated. Practitioners are defensive and wary. Skeptical scrutiny is opposed. When the pseudoscientific hypothesis fails to catch fire with scientists, conspiracies to suppress it are deduced.

Pseudoscience speaks to powerful emotional needs that science often leaves unfulfilled. It caters to fantasies about personal powers we lack and long for.

Lost somewhere between the eternity of time and immensity of space is our tiny planetary home

Al parecer anhelamos un privilegio, merecido no por nuestros esfuerzos, sino por nacimiento, digamos que por el mero hecho de ser humanos y de haber nacido en la Tierra. Podríamos llamarla la noción antropocéntrica, <>.

Está noción alcanza su culminación en la idea de que fuimos creados a imagen y semejanza de Dios: <> El filósofo griego del siglo VI a. J.C. Jenófanes comprendió la arrogancia de esta perspectiva:

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There is some evidence that dreaming is necessary. When people or other mammals are deprived of REM sleep (by awakening them as soon as the characteristic REM and EEG dream patterns emerge), the number of initiations of the dream state per night goes up, and, in severe cases, daytime hallucinations-that is, waking dreams-occur.

“Do you understand what’s going on?”
“Not at all,” he shouted back. “I can almost prove this can’t be happening.”

Imagine we could accelerate continuously at 1 g — what we're comfortable with on good old terra firma — to the midpoint of our voyage, and decelerate continuously at 1 g until we arrive at our destination. It would take a day to get to Mars, a week and a half to Pluto, a year to the Oort Cloud, and a few years to the nearest stars.

You get to thinking of the Earth as an organism, a living thing. You get to worry about it, care for it, wish it well. National boundaries are as invisible as meridians of longitude, or the Tropics of Cancer and Capricorn. The boundaries are arbitrary. The planet is real. Spaceflight, therefore, is subversive. If they are fortunate enough to find themselves in Earth orbit, most people, after a little meditation, have similar thoughts. The nations that had instituted spaceflight had done so largely for nationalistic reasons; it was a small irony that almost everyone who entered space received a startling glimpse of a transnational perspective, of the Earth as one world. It

Consideremos nuevamente este punto. Eso es aquí, Es nuestro hogar. Eso somos nosotros. En él están todos los que amamos, todo los que conoces, todos de quiénes haz oído hablar, y todos los seres humanos, quiens fueran que han vivido sus vidas. La suma de nuestra alegría y sufrimiento, miles de confiadas religiones, ideologías y doctrinas económicas, cada cazador y recolector, cada héroe y cobarde, cada creador y destructor de la civilizaciones, cada rey y cada campesino, cada joven pareja de enamorados, cada madre y padre, cada esperanzado niño, inventor y explorador, cada maestro de moral, cada político corrupto, cada “superestrella”, cada “líder supremo”, cada santo y pecador en la historia de nuestra especie vivió ahí: en una mota de polvo suspendida en un rayo de Sol.

La Tierra es un muy pequeño escalón en una vasta arena cósmica. Piensa en los ríos de sangre derramados por todos esos generales y emperadores, para que, en gloria y triunfo, pudieran convertirse en amos momentáneos de una fracción de un punto. Piensa en las interminables crueles visitas que los habitantes de una esquina de ese pixel hicieron contra los apenas distinguibles habitantes de alguna otra esquina; la frecuencia de sus malentendidos, la impaciencia por matarse unos a otros, la generación de fervientes odios. Nuestras posturas, nuestra imaginada auto-importancia, la falsa ilusión de tener una posición privilegiada en el Universo, son desafiadas por este pálido punto de luz.

Nuestro planeta es una mota solitaria en la inmensa oscuridad cósmica. En nuestra oscuridad, en toda esta vastedad, no hay ni un indicio de que la ayuda llegará desde algún otro lugar para salvarnos de nosotros mismos. La Tierra es el único mundo conocido hasta ahora que alberga vida. No hay ningún otro lugar, al menos en el futuro cercano, al cual nuestra especie pudiera migrar. ¿Visitar?, Sí. Establecerse, ¿aún no?. Nos guste o no, por el momento la Tierra es donde tenemos que quedarnos.

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