“Even if the aliens are short, dour, and sexually obsessed—if they’re here, I want to know about them.” — Carl Sagan Copy Share Image
We are made of star stuff. For the most part, atoms heavier than hydrogen were created in the interiors of stars and… — Carl Sagan Copy Share Image
There is perhaps no better a demonstration of the folly of human conceits than this distant image of our tiny world. — Carl Sagan Copy Share Image
Once we overcome our fear of being tiny, we find ourselves on the threshold of a vast and awesome Universe that utterly… — Carl Sagan Copy Share Image
“Across the sea of space. The stars are other suns. We have traveled this way before. And there is much to be… — Carl Sagan Copy Share Image
“We have examined the universe in space and seen that we live on a mote of dust circling a humdrum star in… — Carl Sagan Copy Share Image
“The total amount of energy from outside the solar system ever received by all the radio telescopes on the planet Earth is… — Carl Sagan Copy Share Image
For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this… — Carl Sagan Copy Share Image
“Once upon a time, we soared into the Solar System. For a few years. Then we hurried back. Why? What happened? What… — Carl Sagan Copy Share Image
A new consciousness is developing which sees the earth as a single organism and recognizes that an organism at war with itself… — Carl Sagan Copy Share Image
“Or perhaps they are here, but in hiding because of some Lex Galactica , some ethic of noninterference with emerging civilizations. We… — Carl Sagan Copy Share Image
Since, in the long run, every planetary society will be endangered by impacts from space, every surviving civilization is obliged to become… — Carl Sagan Copy Share Image
“For me, the most ironic token of [the first human moon landing] is the plaque signed by President Richard M. Nixon that… — Carl Sagan Copy Share Image
“Each Voyager is itself a message. In their exploratory intent, in the lofty ambition of their objectives, in their utter lack of… — Carl Sagan Copy Share Image
“The chance of receiving a signal from a civilization exactly as advanced as we are should be minuscule. If they were even… — Carl Sagan Copy Share Image
“A scientific colleague tells me about a recent trip to the New Guinea highlands where she visited a stone age culture hardly… — Carl Sagan Copy Share Image
“Do you believe in UFOs?” I’m always struck by how the question is phrased, the suggestion that this is a matter of… — Carl Sagan Copy Share Image
“I'm frequently asked, "Do you believe there's extraterrestrial intelligence?" I give the standard arguments- there are a lot of places out there,… — Carl Sagan Copy Share Image
“I do not think it irresponsible to portray even the direst futures if we are to avoid them we must understand that… — Carl Sagan Copy Share Image
“The scope and audacity of John Kennedy’s May 25, 1961, message to a joint session of Congress on “Urgent National Needs”—the speech… — Carl Sagan Copy Share Image
We on Earth have just awakened to the great oceans of space and time from which we have emerged. We are the… — Carl Sagan Copy Share Image
“No civilization can possibly survive to an interstellar spacefaring phase unless it limits its numbers. Any society with a marked population explosion… — Carl Sagan Copy Share Image
“One consequence of this train of argument is that, even if civilizations commonly arise on planets throughout the Galaxy, few of them… — Carl Sagan Copy Share Image
“Our television signals leave this planet and go out into space...the signals spread out from the earth in spherical waves, a little… — Carl Sagan Copy Share Image
“The laws of nature cannot be randomly reshuffled at the cusps [of an oscillating universe]. If the universe has already gone through… — Carl Sagan Copy Share Image
“Look again at that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever… — Carl Sagan Copy Share Image
“Planetary exploration satisfies our inclination for great enterprises and wanderings and quests that has been with us since our days as hunters… — Carl Sagan Copy Share Image
“At the very moment that humans discovered the scale of the universe and found that their most unconstrained fancies were in fact… — Carl Sagan Copy Share Image
There is every reason to think that in the coming years Mars and its mysteries will become increasingly familiar to the inhabitants… — Carl Sagan Copy Share Image
If our long-term survival is at stake, we have a basic responsibility to our species to venture to other worlds. Sailors on… — Carl Sagan Copy Share Image
In the fabric of space and in the nature of matter, as in a great work of art, there is, written small,… — Carl Sagan Copy Share Image
By looking far out into space we are also looking far back into time, back toward the horizon of the universe, back… — Carl Sagan Copy Share Image
The boundary between space and the earth is purely arbitrary. And I'll probably always be interested in this planet - it's my… — Carl Sagan Copy Share Image
“The American and Russian capabilities in space science and technology mesh; they interdigitate. Each is strong where the other is weak. This… — Carl Sagan Copy Share Image
National boundaries are not evident when we view the Earth from space. Fanatical ethnic or religious or national chauvinisms are a little… — Carl Sagan Copy Share Image
An extraterrestrial being, newly arrived on Earth - scrutinizing what we mainly present to our children in television, radio, movies, newspapers, magazines,… — Carl Sagan Copy Share Image
“There are so many examples of human misuse of the Earth that even phrasing this question chills me. If there is life… — Carl Sagan Copy Share Image
“The Apollo pictures of the whole Earth conveyed to multitudes something well known to astronomers: On the scale of the worlds -… — Carl Sagan Copy Share Image
It is sometimes said that scientists are unromantic, that their passion to figure out robs the world of beauty and mystery. But is it… — Carl Sagan Copy Share Image
The prediction of nuclear winter is drawn not, of course, from any direct experience with the consequences of global nuclear war, but rather from… — Carl Sagan Copy Share Image
The suppression of uncomfortable ideas may be common in religion or in politics, but it is not the path to knowledge; it has no… — Carl Sagan Copy Share Image
“Telepathy’ literally means to feel at a distance, just as ‘telephone’ is to hear at a distance and ‘television’ is to see at a… — Carl Sagan Copy Share Image
“On the scale of worlds—to say nothing of stars or galaxies—humans are inconsequential, a thin film of life on an obscure and solitary lump… — Carl Sagan Copy Share Image
Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies,… — Carl Sagan Copy Share Image
In our time, we have sifted the sands of Mars, we have established a presence there, we have fulfilled a century of dreams! — Carl Sagan Copy Share Image
“[ When a religious couple wrote to Sagan about fulfilled prophecies, he wrote back in May 1996 :] If ‘fulfilled prophecy’ is your criterion,… — Carl Sagan Copy Share Image
“Books permit us to voyage through time, to tap the wisdom of our ancestors. The library connects us with the insight and knowledge, painfully… — Carl Sagan Copy Share Image
We live on a hunk of rock and metal that circles a humdrum star that is one of 400 billion other stars that make… — Carl Sagan Copy Share Image
A tiny blue dot set in a sunbeam. Here it is. That's where we live. That's home. We humans are one species and this… — Carl Sagan Copy Share Image
![“For me, the most ironic token of [the first human moon landing] is the plaque signed by President Richard M. Nixon that Apollo 11 took to the moon. It reads: "We came in peace for all Mankind." As the United States was dropping 7 ½ megatons of conventional explosives on small nations in Southeast…” quote by Carl Sagan](https://sms4smile.com/quotes/img-quotes/e05/carl-sagan-160_apollo_for-me-the-most-ironic-token-of-the-firs_259130.jpg)
![“The laws of nature cannot be randomly reshuffled at the cusps [of an oscillating universe]. If the universe has already gone through many oscillations, many possible laws of gravity would have been so weak that, for any given initial expansion, the universe would not have held together. Once the…” quote by Carl Sagan](https://sms4smile.com/quotes/img-quotes/311/carl-sagan-160_laws-of-physics_the-laws-of-nature-cannot-be-randomly-re_546681.jpg)
![“[ When a religious couple wrote to Sagan about fulfilled prophecies, he wrote back in May 1996 :] If ‘fulfilled prophecy’ is your criterion, why do you not believe in materialistic science, which has an unparalleled record of fulfilled prophecy? Consider, for example, eclipses.” quote by Carl Sagan](https://sms4smile.com/quotes/img-quotes/875/carl-sagan-160_belief_when-a-religious-couple-wrote-to-sagan-a_25095.jpg)
