39 Alien Quotes from Famous Scientists and Others About Extraterrestrial Life

Liputan6.com, Jakarta - Most people have looked up at the stars and felt something hard to explain. A mix of wonder, smallness, and deep curiosity. The universe is so big, and the idea that Earth holds the only life in it seems almost impossible to believe. Alien quotes speak directly to this feeling, words that put into language what so many people quietly think about.

The topic of aliens has been part of human culture for a very long time. It appears in old myths, modern films, and serious space research. People disagree about many things, but the fascination with extraterrestrial life is something almost everyone shares. It is exactly this shared curiosity that makes alien quotes so easy to connect with, no matter who you are.

In this article, we have gathered some of the best alien quotes from researchers and other famous figures. These quotes will expand your curiosity about the universe and life beyond Earth. Lets get started.

1. "There may be aliens in our Milky Way galaxy, and there are billions of other galaxies. The probability is almost certain that there is life somewhere in space." - Buzz Aldrin

2. "I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth." - Stephen Hawking

3. “In the deepest sense the search for extraterrestrial intelligence is a search for ourselves.” - Carl Sagan

4. “A time will come when men will stretch out their eyes. They should see planets like our Earth.” - Christopher Wren

5. “A single message from space will show that it is possible to live through technological adolescence… It is possible that the future of human civilization depends on the receipt of interstellar messages.” - Carl Sagan

6. "The possibility of reduced-time interstellar travel either by advanced extraterrestrial civilizations at present or ourselves in the future, is not fundamentally constrained by physical principles." - Harold E. Puthoff

7. "The biggest breakthrough in the next 50 years will be the discovery of extraterrestrial life. We have been searching for it for 50 years and found nothing. That proves life is rarer than we hoped, but does not prove that the universe is lifeless. We are only now developing the tools to make our searches efficient and far-reaching, as optical and radio detection and data processing move forward." - Freeman Dyson

8. "Within the scientific community, there is healthy skepticism. And the question is, 'How do you ever get to a meaningful null result? How long and how hard do SETI scientists have to look for extraterrestrial intelligence and find nothing before they say, 'There is nothing. We are alone.'" - Debra Fischer

9. "For many centuries, humans have speculated that there might be planetary systems around other stars and that there could be extraterrestrial life there and even intelligent being. However, those were simply speculations, and now we have evidence for the first part of these ideas." - George Smoot

10. "Clearly, unless thinking beings inevitably wipe themselves out soon after developing technology, extraterrestrial intelligence could often be millions or billions of years in advance of us. We're the galaxy's noodling newbies." - Seth Shostak

11. “Our sun is one of 100 billion stars in our galaxy. Our galaxy is one of the billions of galaxies populating the universe. It would be the height of presumption to think that we are the only living things within that enormous immensity.” - Werner von Braun

12. “In very different ways, the possibility that the universe is teeming with life, and the opposite possibility that we are totally alone, are equally exciting. Either way, the urge to know more about the universe seems to me irresistible, and I cannot imagine that anybody of truly poetic sensibility could disagree.” - Richard Dawkins

13. "If our solar system is not unusual, then there are so many planets in the universe that, for example, they outnumber the sum of all sounds and words ever uttered by every human who has ever lived. To declare that Earth must be the only planet with life in the universe would be inexcusably bigheaded of us." - Neil deGrasse Tyson

14. "I’d bet almost anything that life from another planet, if formed independently from life on Earth, would be more different from all species of Earth life than any two species of Earth life are from each other." - Neil deGrasse Tyson

15. "We have never denied that it is possible, indeed probable, that other forms of life, even intelligent life, exist in the universe. But this is different from the belief that we are now being visited by extraterrestrial beings in spacecraft, that they are abducting people, and the there is a vast government cover-up." - Paul Kurtz

16. "If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans." - Stephen Hawking

17. "To my mathematical brain, the numbers alone make thinking about aliens perfectly rational." - Stephen Hawking

1. “The earth is not alone, it is not like a single apple on a tree; there are many apples on the tree, and there are many trees in the orchard.” - John Burroughs

2. "In our time the search for extraterrestrial life will eventually change our laws, our religions, our philosophies, our arts, our recreations, as well as our sciences. Space, the mirror, waits for life to come look for itself there." - Ray Bradbury

3. "I can assure you that flying saucers, given that they exist, are not constructed by any power on Earth." - Harry S. Truman

4. "Discovering traces of life on Mars would be of tremendous scientific significance: The first time that any signs of extraterrestrial life had ever been detected. Many people would also find it heartening to learn that we're not entirely alone in this vast, cold cosmos." - Nick Bostrom

5. "The fancy that extraterrestrial life is by definition of a higher order than our own is one that soothes all children, and many writers." - Joan Didion

6. "Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying." - Arthur C. Clarke

7. “If it is just us, seems like an awful waste of space.” - Carl Sagan

8. “It is unnatural in a large field to have only one shaft of wheat, and in the infinite Universe only one living world." - Metrodorus of Chios

9. “To consider the Earth as the only populated world in infinite space is as absurd as to assert that in an entire field sown with millet, only one grain will grow.” - Metrodorus of Chios

10. "The phenomenon of UFOs does exist, and it must be treated seriously." - Mikhail Gorbachev

11. "Out beyond our world there are, elsewhere, other assemblages of matter making other worlds. Ours is not the only one in air's embrace." - Lucretius

12. "The universe is so big, there's so many worlds, there must be one of them or more, something that's alive." - Jeff Goldblum

1. "I'm not at liberty to discuss the governments knowledge of extraterrestrial UFO's at this time. I am still personally being briefed on the subject!" - Richard M. Nixon

2. “I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.” - Arthur C. Clarke

3. "The surest sign that intelligent life exists elsewhere in the universe is that it has never tried to contact us." - Bill Watterson

4. "You may not see massive UFO exhibits at your local science museum, but there's no dearth of saucer stories infesting my email. Every day, I receive several reports of alien sightings, extraterrestrial plans for Earth, and agitated screeds about the reluctance of scientists to take the whole subject seriously." - Seth Shostak

5. "The US Airforce assures me that UFO's pose no threat to National Security." - John F. Kennedy

6. "I imagine if aliens came down to Earth, they'd actually be quite tall; people seem to get everything right about extraterrestrials but the size!" - Nicolas Roeg

7. "After one look at this planet any visitor from outer space would say 'I want to see the manager.'" - William S. Burroughs

8. "For all we know, the aliens have already done this and unwittingly concluded that there was no intelligent life on Earth. They would now be looking elsewhere. A more humbling possibility would be if aliens had become aware of the technologically proficient species that now inhabits Earth, yet they had drawn the same conclusion." - Neil deGrasse Tyson

9. "FM signals and those of broadcast television…[travel] out to space at the speed of light. Any eavesdropping alien civilization will know all about our TV programs (probably a bad thing), will hear all our FM music (probably a good thing), and know nothing of the politics of AM talk-show hosts (probably a safe thing)." - Neil deGrasse Tyson

10. "We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet." - Stephen Hawking