Explore the most impactful and insightful quotes and sayings by Stephen Hawking, and enrich your perspective with the wisdom. Share these inspiring Stephen Hawking quotes pictures with your friends on social media platforms such as Facebook, Twitter, or your personal blogs, completely free. Here are the top 543 Stephen Hawking quotes for you to read and share.
Remember to look up at the stars and not down at your feet. Try to make sense of what you see and wonder about what makes the universe exist. Be curious. And however difficult life may seem, there is always something you can do and succeed at.
It matters that you don't just give up. -- Stephen Hawking
The doctor who diagnosed me with ALS, or motor neuron disease, told me that it would kill me in two or three years. -- Stephen Hawking
Earth might one day soon resemble the planet Venus. -- Stephen Hawking
As a result, in more than three dimensions the sun would not be able to exist in a stable state with its internal pressure balancing the pull of gravity. It would either fall apart or collapse to form a black hole, either of which could ruin your day. -- Stephen Hawking
God is the name people give to the reason we are here. But I think that reason is the laws of physics rather than someone with whom one can have a personal relationship. An impersonal God. -- Stephen Hawking
Stephen Hawking Quotes
Look up at the stars and not down at your feet. Try to make sense of what you see, and wonder about what makes the universe exist. Be curious.
Stephen Hawking -- Stephen Hawking
What I have done is to show that it is possible for the way the universe began to be determined by the laws of science. In that case, it would not be necessary to appeal to God to decide how the universe began. This doesn't prove that there is no God, only that God is not necessary. -- Stephen Hawking
We are all now connected by the Internet, like neurons in a giant brain. -- Stephen Hawking
have taken the opportunity to update the book and include new theoretical and observational results obtained since the book was first published (on April Fools' Day, 1988). I have -- Stephen Hawking
I have taken the opportunity to update the book and include new theoretical and observational results obtained since the book was first published (on April Fools' Day, 1988). -- Stephen Hawking
Observations indicate that the universe is expanding at an ever increasing rate. It will expand forever, getting emptier and darker. -- Stephen Hawking
There is a fundamental difference between religion, which is based on authority, and science, which is based on observation and reason. Science will win because it works. -- Stephen Hawking
Over a very small number of rolls of the dice, the uncertainty principle is very important. -- Stephen Hawking
No one can resist the idea of a crippled genius. -- Stephen Hawking
Doing a job RIGHT the first time gets the job done. Doing the job WRONG fourteen times gives you job security. -- Stephen Hawking
I don't know what my IQ is. People who gloat about their IQ's are losers -- Stephen Hawking
Stephen Hawking said that his quest is simply "trying to understand the mind of God". -- Stephen Hawking
The increase of disorder or entropy is what distinguishes the past from the future, giving a direction to time. -- Stephen Hawking
If I had to choose a superhero to be, I would pick Superman. He's everything that I'm not. -- Stephen Hawking
In fact, if one considers the possible constants and laws that could have emerged, the odds against a universe that produced life like ours are immense. -- Stephen Hawking
A snooze button is a poor substitute for no alarm clock at all. -- Stephen Hawking
Some forms of motor neuron disease are genetically linked, but I have no indication that my kind is. No other member of my family has had it. But I would be in favour of abortion if there was a high risk. -- Stephen Hawking
There should be a better way to start a day than waking up every morning. -- Stephen Hawking
If time travel were possible we'd be inundated with tourist from the future. -- Stephen Hawking
What I have learned from life is to make the most of what you have got. -- Stephen Hawking
If the total energy of the universe must always remain zero, and it costs energy to create a body, how can a whole universe be created from nothing? -- Stephen Hawking
I'm really easy to get along with once you see it my way. -- Stephen Hawking
There are plenty of dead scientists I admire, but I can't think of any living ones. This is probably because it is only in retrospect that one can see who made the important contributions. -- Stephen Hawking
The human race does not have a very good record of intelligent behavior. -- Stephen Hawking
Maxwell is the physicist's physicist. -- Stephen Hawking
Science is beautiful when it makes simple explanations of phenomena or connections between different observations. Examples include the double helix in biology and the fundamental equations of physics. -- Stephen Hawking
Not to take this web of dualities as a sign we are on the right track would be a bit like believing that God put fossils into the rocks in order to mislead Darwin about the evolution of life. -- Stephen Hawking
It is reasonable to ask who or what created the universe, but if the answer is God, then the question has merely been deflected to that of who created God. -- Stephen Hawking
Most sets of values would give rise to universes that, although they might be very beautiful, would contain no one able to wonder at that beauty. -- Stephen Hawking
[Question: Do you feel that scientists correct themselves as often as they should?]
More often than politicians, but not as often as they should. -- Stephen Hawking
I would like nuclear fusion to become a practical power source. It would provide an inexhaustible supply of energy, without pollution or global warming. -- Stephen Hawking
Before we understand science, it is natural to believe that God created the universe. -- Stephen Hawking
My work and my family are very important to me. -- Stephen Hawking
The human race shouldn't have all its eggs in one basket, or on one planet. Let's hope we can avoid dropping the basket until we have spread the load. -- Stephen Hawking
We create history by our observation, rather than history creating us. -- Stephen Hawking
According to 'M' theory, ours is not the only universe. Instead, 'M' theory predicts that a great many universes were created out of nothing. -- Stephen Hawking
I have wanted to fly into space for many years, but never imagined it would really be feasible. -- Stephen Hawking
Scientific discovery may not be better than sex, but the satisfaction lasts longer. -- Stephen Hawking
Just like a computer, we must remember things in the order in which entropy increases. This makes the second law of thermodynamics almost trivial. Disorder increases with time because we measure time in the direction in which disorder increases. You can't have a safer bet than that! -- Stephen Hawking
It surprises me how disinterested we are today about things like physics, space, the universe and philosophy of our existence, our purpose, our final destination. Its a crazy world out there. Be curious. -- Stephen Hawking
Issuing an insurance policy against abduction by aliens seems a pretty safe bet. -- Stephen Hawking
The North Pole, but to someone looking from the equator, it appears to lie just at the horizon. From the difference in the apparent position of the North Star in Egypt and Greece, Aristotle even quoted an estimate that the distance -- Stephen Hawking
So Einstein was wrong when he said, "God does not play dice." Consideration of black holes suggests, not only that God does play dice, but that he sometimes confuses us by throwing them where they can't be seen. -- Stephen Hawking
A zero-gravity flight is a first step toward space travel. -- Stephen Hawking
Philosophers have not kept up with modern developments in science. Particularly physics. -- Stephen Hawking
The fact that light travels at a finite, but very high, speed was first discovered in 1676 by the Danish astronomer Ole Christensen Roemer. -- Stephen Hawking
I think the human race has no future if it doesn't go into space. -- Stephen Hawking
In a sense the debate between Penrose and Hawking is a continuation of that earlier argument, with Penrose playing the role of Einstein and Hawking that of Bohr. -- Stephen Hawking
I had a bet with Gordon Kane of Michigan University that the Higgs particle wouldn't be found. -- Stephen Hawking
Up to about thirty years ago, it was thought that protons and neutrons were "elementary" particles, but experiments in which protons were collided with other protons or electrons at high speeds indicated that they were in fact made up of smaller particles. -- Stephen Hawking
Another prediction of general relativity is that time should appear to run slower near a massive body like the earth. -- Stephen Hawking
Science predicts that many different kinds of universe will be spontaneously created out of nothing. It is a matter of chance which we are in. -- Stephen Hawking
The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful. It would heat your pizza only to minus 271.3*C - not much good for defrosting the pizza, let alone cooking it. -- Stephen Hawking
We don't let animals suffer, so why humans? -- Stephen Hawking
The lesson of the book is that the universe is governed by the laws of science. -- Stephen Hawking
There's no way to remove the observer - us - from our perceptions of the world. -- Stephen Hawking
The discovery that the universe was expanding was one of the great intellectual revolutions of the twentieth century. -- Stephen Hawking
There should be no boundary to human endeavor. -- Stephen Hawking
Some people would claim that things like love, joy and beauty belong to a different category from science and can't be described in scientific terms, but I think they can now be explained by the theory of evolution. -- Stephen Hawking
There's a sick joke that the reason we have not been contacted by an alien civilization is that civilizations tend to destroy themselves when they reach our stage. But I have sufficient faith in the good sense of public to believe that we might prove this wrong. -- Stephen Hawking
Perhaps we could write code to optimize code, then run that code through the code optimizer? -- Stephen Hawking
There are no black holes in the sense of regimes from which light can't escape to infinity. -- Stephen Hawking
It matters if you just don't give up. -- Stephen Hawking
If you lined up all the cars in the world end to end, someone would try to pass them. -- Stephen Hawking
We think we have solved the mystery of creation. Maybe we should patent the universe and charge everyone royalties for their existence. -- Stephen Hawking
One should love animals. They are so tasty. -- Stephen Hawking
I have wondered about time all my life. -- Stephen Hawking
What did God do before he created the universe? -- Stephen Hawking
God does not play dice. -- Stephen Hawking
One does not have to appeal to God to set the initial conditions for the creation of the universe, but if one does He would have to act through the laws of physics. -- Stephen Hawking
Some people make a great mystery of this idea, sometimes called the multiverse concept, but these are just different expressions of the Feynman sum over histories. -- Stephen Hawking
One big contribution my father [Stephen Hawking] has made is to show that having a disability does not bar you from leading a full and eventful life. -- Stephen Hawking
I can't disguise myself with a wig and dark glasses - the wheelchair gives me away. -- Stephen Hawking
Our universe and its laws appear to have a design that both is tailor-made to support us and, if we are to exist, leaves little room for alteration. That is not easily explained, and raises the natural question of why it is that way. -- Stephen Hawking
Many badly needed goals, like fusion and cancer cure, would be achieved much sooner if we invested more. -- Stephen Hawking
I regard the afterlife to be a fairy story for people that are afraid of the dark -- Stephen Hawking
Theology is unnecessary. -- Stephen Hawking
[In the Universe it may be that] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet to occur on Earth. -- Stephen Hawking
Not only does God play dice but ... he sometimes throws them where they cannot be seen. -- Stephen Hawking
Of course it is possible that UFO's really do contain aliens as many people believe, and the government is hushing it up -- Stephen Hawking
Most people don't have time to master the very mathematical details of theoretical physics. -- Stephen Hawking
It is very important for young people keep their sense of wonder and keep asking why. -- Stephen Hawking
In my opinion, there is no aspect of reality beyond the reach of the human mind. -- Stephen Hawking
It is not clear that intelligence has any long-term survival value. -- Stephen Hawking
I am in touch with a company that hopes to replicate my voice. However, they are not replicating my original voice - if they did that, I would sound like a man in his 20s, which would be very strange! They are actually trying to replicate the synthesizer that sits on my wheelchair. -- Stephen Hawking
An expanding universe does not preclude a creator, but it does place limits on when he might have carried out his job! -- Stephen Hawking
Science can lift people out of poverty and cure disease. That, in turn, will reduce civil unrest. -- Stephen Hawking
Never put off the work till tomorrow what you can put off today. -- Stephen Hawking
I don't care much for equations myself. This is partly because it is difficult for me to write them down, but mainly because I don't have an intuitive feeling for equations. -- Stephen Hawking
In A Brief History Of Time I used the word "God" like Einstein did as a shorthand for the laws of physics. However, this is not what most people mean by God, so I have decided not to use the term. The laws of physics can explain the universe without the need for a God. -- Stephen Hawking
Simplicity is a matter of taste -- Stephen Hawking
Or in other words, why does disorder increase in the same direction of time as that in which the universe expands? -- Stephen Hawking
Success is a relative term. It brings so many relatives. -- Stephen Hawking
Working with my father [Stephen Hawking ] is a great thrill - he has the amazing ability to hold enormous amounts of information in his head. -- Stephen Hawking
The progress of the human race in understanding the universe has established a small corner of order in an increasingly disordered universe. -- Stephen Hawking
Wagner manages to convey emotion with music better than anyone, before or since. -- Stephen Hawking
I believe that the long-term future of the human race must be space and that it represents an important life insurance for our future survival, as it could prevent the disappearance of humanity by colonizing other planets, -- Stephen Hawking
A proton or neutron is made up of three quarks, one of each color. A proton contains two up quarks and one down quark; a neutron contains two down and one up. -- Stephen Hawking
Women. They are a complete mystery to me. -- Stephen Hawking
Anthropic principle: We see the universe the way it is because if it were different we would not be here to observe it. Antiparticle: -- Stephen Hawking
The idea of 10 dimensions might sound exciting, but they would cause real problems if you forget where you parked your car. -- Stephen Hawking
It's clearly possible for a something to acquire higher intelligence than its ancestors: we evolved to be smarter than our ape-like ancestors, and Einstein was smarter than his parents. -- Stephen Hawking
I do not believe in a personal God. -- Stephen Hawking
We lived in a tall, narrow Victorian house, which my parents had bought very cheaply during the war, when everyone thought London was going to be bombed flat. In fact, a V-2 rocket landed a few houses away from ours. I was away with my mother and sister at the time, but my father was in the house. -- Stephen Hawking
When you're faced with the possibility of an early death, it makes you realize that life is worth living and there are a lots of things you want to do. -- Stephen Hawking
If you understand how the universe operates, you control it, in a way. -- Stephen Hawking
Unless mankind redesigns itself by changing our DNA through altering our genetic makeup, computer-genera ted robots will take over our world. -- Stephen Hawking
The electromagnetic attraction between negatively charged electrons and positively charged protons in the nucleus causes the electrons to orbit the nucleus of the atom, just as gravitational attraction causes the earth to orbit the sun. -- Stephen Hawking
Evolution has ensured that our brains just aren't equipped to visualise 11 dimensions directly. However, from a purely mathematical point of view it's just as easy to think in 11 dimensions, as it is to think in three or four. -- Stephen Hawking
We also now have evidence for several other black holes in systems like Cygnus X-l in our galaxy and in two neighboring galaxies called the Magellanic Clouds. The -- Stephen Hawking
I was born on January 8, 1942, exactly three hundred years after the death of Galileo. I estimate, however, that about two hundred thousand other babies were also born that day. I don't know whether any of them was later interested in astronomy. -- Stephen Hawking
If I have questions about the universe on my mind when I go to bed, I can't turn off. I dream equations all night. -- Stephen Hawking
I'd say I don't believe in God, but I'm afraid He might hear me. -- Stephen Hawking
The "Powers That Be" are not smart enough to engineer Armageddon, but they may yet be stupid enough. If governments are involved in covering up the knowledge of aliens, then they are doing a much better job of it than they seem to do at anything else. -- Stephen Hawking
My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all. -- Stephen Hawking
the physicist John Wheeler once calculated that if one took all the heavy water in all the oceans of the world, one could build a hydrogen bomb that would compress matter at the center so much that a black hole would be created. (Of course, there would be no one left to observe it!) -- Stephen Hawking
Eventually, however, the star will run out of its hydrogen and other nuclear fuels. Paradoxically, the more fuel a star starts off with, the sooner it runs out. This is because the more massive the star is, the hotter it needs to be to balance its gravitational attraction. -- Stephen Hawking
Not to leave planet Earth would be like castaways on a desert island not trying to escape ... Sending humans to other planets ... will shape the future of the human race in ways we don't yet understand, and may determine whether we have any future at all. -- Stephen Hawking
Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out. -- Stephen Hawking
. . .a scientific theory is just a mathematical model we make to describe our observations: it exists only in our minds. So it is meaningless to ask: which is real, "real" or "imaginary" time? It is simply a matter of which is the more useful description. -- Stephen Hawking
Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. No matter how many times the results of experiments agree with some theory, you can never be sure that the next time the result will not contradict the theory. -- Stephen Hawking
We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special. -- Stephen Hawking
I like physics, but I love cartoons. -- Stephen Hawking
We have seen in this chapter how, in less than half a century, man's view of the universe, formed over millennia, has been transformed. -- Stephen Hawking
I have visited Japan several times and have always been shown wonderful hospitality. -- Stephen Hawking
One of the basic rules of the universe is that nothing is perfect. Perfection simply doesn't exist ... Without imperfection, neither you nor I would exist -- Stephen Hawking
If you believe in science, like I do, you believe that there are certain laws that are always obeyed. -- Stephen Hawking
In modern science laws of nature are usually phrased in mathematics. They can be either exact or approximate, but they must have been observed to hold without exception - if not universally, then at least under a stipulated set of conditions. For -- Stephen Hawking
The human failing I would most like to correct is aggression. It may have had survival advantage in caveman days, to get more food, territory or partner with whom to reproduce, but now it threatens to destroy us all. -- Stephen Hawking
Now, if you believe that the universe is not arbitrary, but is governed by definite laws, you ultimately have to combine the partial theories into a complete unified theory that will describe everything in the universe. -- Stephen Hawking
M-theory is the unified theory Einstein was hoping to find. -- Stephen Hawking
Why does the universe go to all the bother of existing? Is the unified theory so compelling that it brings about its own existence? Or does it need a creator, and, if so, does he have any other effect on the universe? And who created him? -- Stephen Hawking
The media need superheroes in science just as in every sphere of life, but there is really a continuous range of abilities with no clear dividing line. -- Stephen Hawking
Only time(whatever that may be) will tell. -- Stephen Hawking
I believe everyone should have a broad picture of how the universe operates and our place in it. It is a basic human desire. And it also puts our worries in perspective. -- Stephen Hawking
There is no physical law precluding particles from being organised in ways that perform even more advanced computations than the arrangements of particles in human brains. -- Stephen Hawking
If human life were long enough to find the ultimate theory, everything would have been solved by previous generations. Nothing would be left to be discovered. -- Stephen Hawking
Imaginary time is a new dimension, at right angles to ordinary, real time. -- Stephen Hawking
Although almost every theoretical physicist agrees with my prediction that a black hole should glow like a hot body, it would be very difficult to verify experimentally because the temperature of a macroscopic black hole is so low. -- Stephen Hawking
But a machine that was powerful enough to accelerate particles to the grand unification energy would have to be as big as the Solar System - and would be unlikely to be funded in the present economic climate. -- Stephen Hawking
If you think it is hard to get humans to follow traffic laws, imagine convincing an asteroid to move along an ellipse. -- Stephen Hawking
God not only plays dice, he throws them in the corner where you can't see them. -- Stephen Hawking
Whether you want to uncover the secrets of the universe, or you just want to pursue a career in the 21st century, basic computer programming is an essential skill to learn -- Stephen Hawking
There should be no boundaries to human endeavor. ( ... ) However bad life may seem ( ... ) While there's life, there is hope. -- Stephen Hawking
It was Einstein's dream to discover the grand design of the universe, a single theory that explains everything. However, physicists in Einstein's day hadn't made enough progress in understanding the forces of nature for that to be a realistic goal. -- Stephen Hawking
If the theory is confirmed by observation, it will be the successful conclusion of a search going back more than 3,000 years. We will have found the grand design. -- Stephen Hawking
Because imaginary time behaves like another direction in space, histories in imaginary time can be closed surfaces, like the surface of the Earth, with no [existential] beginning or end. -- Stephen Hawking
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
It was recently discovered that research causes cancer in rats. -- Stephen Hawking
Science makes god unnecessary. -- Stephen Hawking
What was God doing before the divine creation? -- Stephen Hawking
Love the neighbor. But don't get caught. -- Stephen Hawking
We believe human begins have existed for only a small fraction of cosmic history, because human race has been improving so rapidly in knowledge and technology that if people had been around for millions of years, the human race would be much further along in it's mastery. -- Stephen Hawking
TEAMWORK ... means never having to take all the blame yourself. -- Stephen Hawking
One cannot really argue with a mathematical theorem. -- Stephen Hawking
Science will win because it works. -- Stephen Hawking
Science does not deny religion, it just offers a simpler alternative. -- Stephen Hawking
In less than a hundred years, we have found a new way to think of ourselves. From sitting at the center of the universe, we now find ourselves orbiting an average-sized sun, which is just one of millions of stars in our own Milky Way galaxy. -- Stephen Hawking
St. Augustine accepted a date of about 5000 B.C. for the Creation of the universe according to the book of Genesis. (It is interesting that this is not so far from the end of the last Ice Age, about 10,000 B.C., which is when archaeologists tell us that civilization really began.) -- Stephen Hawking
The question is: is the way the universe began chosen by God for reasons we can't understand, or was it determined by a law of science? I believe the second. If you like, you can call the laws of science 'God', but it wouldn't be a personal God that you could meet, and ask questions. -- Stephen Hawking
So long as the universe had a beginning, we could suppose it had a creator. But if the universe is really completely self-contained, having no boundary or edge, it would have neither beginning nor end: it would simply be. What place, then, for a creator? -- Stephen Hawking
However bad life may seem, there is always something you can do and succeed at. Where there's life, there's hope. -- Stephen Hawking
Science is increasingly answering questions that used to be the province of religion. -- Stephen Hawking
It often happens that I have an idea, but then I try to fill in the intermediate steps and find they don't work, so I have to give it up. -- Stephen Hawking
People think I'm a Simpsons character. -- Stephen Hawking
I had not expected 'A Brief History of Time' to be a best seller. It was my first popular book and aroused a great deal of interest. Initially, many people found it difficult to understand. I therefore decided to try to write a new version that would be easier to follow. -- Stephen Hawking
Equations are just the boring part of mathematics. I attempt to see things in terms of geometry. -- Stephen Hawking
The true miracle is that abstract considerations of logic lead to a unique theory that predicts and describes a vast universe full of the amazing variety that we see. -- Stephen Hawking
I have so much that I want to do. I hate wasting time. -- Stephen Hawking
When we understand string theory, we will know how the universe began. It won't have much effect on how we live, but it is important to understand where we come from and what we can expect to find as we explore. -- Stephen Hawking
My expectations were reduced to zero when I was 21. Everything since then has been a bonus.
[The Science of Second-Guessing (New York Times Magazine Interview, December 12, 2004)] -- Stephen Hawking
When one's expectations are reduced to zero, one really appreciates everything one does have. -- Stephen Hawking
All of my life, I have been fascinated by the big questions that face us, and have tried to find scientific answers to them. If, like me, you have looked at the stars, and tried to make sense of what you see, you too have started to wonder what makes the universe exist. -- Stephen Hawking
Before I lost my voice, it was slurred, so only those close to me could understand, but with the computer voice, I found I could give popular lectures. I enjoy communicating science. It is important that the public understands basic science, if they are not to leave vital decisions to others. -- Stephen Hawking
The universe expanded by a factor of 1,000,000,000,000,000,000,000,000,000,000 in .00000000000000000000000000000000001 second. It was as if a coin 1 centimeter in diameter suddenly blew up to ten million times the width of the Milky Way. -- Stephen Hawking
Exploration by real people inspires us. -- Stephen Hawking
I want my books sold on airport bookstalls. -- Stephen Hawking
If the government is covering up knowledge of aliens, they are doing a better job of it than they do at anything else. -- Stephen Hawking
Jesus loves you, but everyone else thinks you're an ass. -- Stephen Hawking
Aristotle thought the earth was stationary and that the sun, the moon, the planets, and the stars moved in circular orbits about the earth. -- Stephen Hawking
Disorder increases with time because we measure time in the direction in which disorder increases. -- Stephen Hawking
Obviously, because of my disability, I need assistance. But I have always tried to overcome the limitations of my condition and lead as full a life as possible. I have traveled the world, from the Antarctic to zero gravity. -- Stephen Hawking
My first popular book, 'A Brief History of Time,' aroused a great deal of interest, but many found it difficult to understand. -- Stephen Hawking
The universe doesn't allow perfection. -- Stephen Hawking
There is a very real danger that we will kill everything on this planet now that we have the technological power to do so. -- Stephen Hawking
I am damned if I'm going to die before I have unraveled more of the universe -- Stephen Hawking
No boundary condition: The idea that the universe is finite but has no boundary (in imaginary time). -- Stephen Hawking
I think those who have a terminal illness and are in great pain should have the right to choose to end their own life, and those that help them should be free from prosecution. -- Stephen Hawking
Many people do not like the idea that time has a beginning, probably because it smacks of divine intervention. (The Catholic Church, on the other hand, seized on the big bang model and in 1951 officially pronounced it to be in accordance with the Bible. -- Stephen Hawking
All that my work has shown is that you don't have to say that the way the universe began was the personal whim of God. -- Stephen Hawking
I want to encourage public interest in space. I have never let my condition stop me. You only live once. -- Stephen Hawking
To my mathematical brain, the numbers alone make thinking about aliens perfectly rational. The real challenge is to work out what aliens might actually be like. -- Stephen Hawking
I think the next century will be the century of complexity. -- Stephen Hawking
Throughout history, people have studied pure science from a desire to understand the universe rather than practical applications for commercial gain. But their discoveries later turned out to have great practical benefits. -- Stephen Hawking
Time and space are finite in extent, but they don't have any boundary or edge. They would be like the surface of the earth, but with two more dimensions. -- Stephen Hawking
Life would be tragic if it weren't funny. -- Stephen Hawking
My advice to other disabled people would be, concentrate on things your disability doesn't prevent you doing well, and don't regret the things it interferes with. Don't be disabled in spirit as well as physically. -- Stephen Hawking
Stem cell research is the key to developing cures for degenerative conditions like Parkinson's and motor neuron disease from which I and many others suffer. The fact that the cells may come from embryos is not an objection, because the embryos are going to die anyway. -- Stephen Hawking
So if a beautiful alien in a flying saucer invites you into her time machine, step with care. You might fall into one of these trapped repeating histories of only finite duration. -- Stephen Hawking
The computer in your cell phone today is a million times cheaper and a thousand times more powerful and about a hundred thousand time smaller than the one computer at MIT in 1965. -- Stephen Hawking
If you feel you are trapped in a black hole, don't give up. There is a way out. -- Stephen Hawking
Perhaps one day I will go into space. -- Stephen Hawking
I have found far greater enthusiasm for science in America than here in Britain. There is more enthusiasm for everything in America. -- Stephen Hawking
It is said that there's no such thing as a free lunch. But the universe is the ultimate free lunch. -- Stephen Hawking
One, remember to look up at the stars and not down at your feet. Two, never give up work. Work gives you meaning and purpose and life is empty without it. Three, if you are lucky enough to find love, remember it is there and don't throw it away. -- Stephen Hawking
God may exist, but science can explain the universe without the need for a creator. -- Stephen Hawking
A theory is a good theory if it satisfies two requirements. It must accurately describe a large class of observations on the basis of a model that contains only a few arbitrary elements, and it must make definite predictions about the results of future observations. -- Stephen Hawking
We are all different. There is no such thing as a standard or run-of-the-mill human being, but we share the same human spirit. -- Stephen Hawking
The mass of the sun curves space-time in such a way that although the earth follows a straight path in four-dimensional space-time, it appears to us to move along a circular orbit in three-dimensional space. -- Stephen Hawking
Though we feel we can choose what we do, our understanding of the molecular basis of biology shows that biological processes are governed by the laws of physics and chemistry and therefore are as determined as the orbits of the planets. -- Stephen Hawking
[Question: What do you think was the most important physics idea to emerge this year?]
We won't know for a few years. -- Stephen Hawking
A million million million million (1 with twenty-four zeros after it) miles, the size of the observable universe. -- Stephen Hawking
A person who smiles in the face of adversity ... probably has a scapegoat. -- Stephen Hawking
But in 1929, Edwin Hubble made the landmark observation that wherever you look, distant galaxies are moving rapidly away from us. In other words, the universe is expanding. -- Stephen Hawking
General theory of relativity and quantum mechanics. They are the great intellectual achievements of the first half of this century. -- Stephen Hawking
As we shall see, the concept of time has no meaning before the beginning of the universe. This was first pointed out by St. Augustine. When asked: "What did God do before he created the universe?" Augustine didn't reply: "He was preparing Hell for people who asked such questions. -- Stephen Hawking
My disability makes this rather a slow process, so I had plenty of time. -- Stephen Hawking
Go the extra mile. It makes your boss look like an incompetent slacker. -- Stephen Hawking
It is tribute to how far we have come in theoretical physics that it now takes enormous machines and a great deal of money to perform experiments whose results we can not predict. -- Stephen Hawking
One can't predict the weather more than a few days in advance. -- Stephen Hawking
I think it quite likely that we are the only civilization within several hundred light years; otherwise we would have heard radio waves. -- Stephen Hawking
Thirty years ago I was diagnosed with motor neurone disease, and given two and a half years to live. I have always wondered how they could be so precise about the half. -- Stephen Hawking
I entered the health care debate in response to a statement in the United States press in summer 2009 which claimed the National Health Service in Great Britain would have killed me off, were I a British citizen. I felt compelled to make a statement to explain the error. -- Stephen Hawking
It also predicted that the electron should have a partner: an antielectron, or positron. The discovery of the positron in 1932 confirmed Dirac's theory and led to his being awarded the Nobel prize for physics in 1933. -- Stephen Hawking
Einstein never accepted that the universe was governed by chance; -- Stephen Hawking
For years, my early work with Roger Penrose seemed to be a disaster for science. It showed that the universe must have begun with a singularity, if Einstein's general theory of relativity is correct. That appeared to indicate that science could not predict how the universe would begin. -- Stephen Hawking
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
I believe in the possible. I believe, small though we are, insignificant though we may be, we can reach a full understanding of the universe. You were right when you said you felt small, looking up at all that up there. We are very, very small, but we are profoundly capable of very, very big things. -- Stephen Hawking
There is a real danger that computers will develop intelligence and take over. We urgently need to develop direct connections to the brain so that computers can add to human intelligence rather than be in opposition. -- Stephen Hawking
I'm not afraid of death, but I'm in no hurry to die. -- Stephen Hawking
We must develop as quickly as possible technologies that make possible a direct connection between brain and computer, so that artificial brains contribute to human intelligence rather than opposing it. -- Stephen Hawking
[On President Bush's plan to get to Mars in 10 years] Stupid. Robots would do a better job and be much cheaper because you don't have to bring them back. -- Stephen Hawking
My wife and I love each other very much. -- Stephen Hawking
Ignorance of nature's ways led people in ancient times to invent gods to lord it over every aspect of human life. -- Stephen Hawking
I can't say that my disability has helped my work, but it has allowed me to concentrate on research without having to lecture or sit on boring committees. -- Stephen Hawking
for the fluctuations in the background. However, within a few years we should know whether we can believe that we live in a universe that is completely self-contained and without beginning or end. -- Stephen Hawking
So look carefully at the map of the microwave sky. It is the blueprint for all the structure in the universe. We are the product of quantum fluctuations in the very early universe. If one were religious, one could say that God really does play dice. -- Stephen Hawking
On the observational side, by far the most important development has been the measurement of fluctuations in the cosmic microwave background radiation by COBE (the Cosmic Background Explorer satellite) -- Stephen Hawking
The people who actually make the advances in theoretical physics don't think in these categories that the philosophers and the historians of science subsequently invent for them -- Stephen Hawking
The intelligent beings in these regions should therefore not be surprised if they observe that their locality in the universe satisfies the conditions that are necessary for their existence. It is a bit like a rich person living in a wealthy neighborhood not seeing any poverty. -- Stephen Hawking
We have made remarkable progress in the last hundred years, but if we want to continue, our future is in space. -- Stephen Hawking
I grew up thinking that a research scientist was a natural thing to be. -- Stephen Hawking
Well-known scientist (some say it was Bertrand Russell) once gave a public lecture on astronomy. -- Stephen Hawking
My father was a research scientist in tropical medicine, so I always assumed I would be a scientist, too. I felt that medicine was too vague and inexact, so I chose physics. -- Stephen Hawking
Why are we here? Where do we come from? Traditionally, these are questions for philosophy, but philosophy is dead. -- Stephen Hawking
The concern here is that financial services become a kind of tech-led Wild West. -- Stephen Hawking
Keeping an active mind has been vital to my survival, as has been maintaining a sense of humor. -- Stephen Hawking
I put a lot of effort into writing 'A Briefer History' at a time when I was critically ill with pneumonia because I think that it's important for scientists to explain their work, particularly in cosmology. This now answers many questions once asked of religion. -- Stephen Hawking
I am discounting reports of UFOs. Why would they appear only to cranks and weirdos? -- Stephen Hawking
Nothing cannot exist forever. -- Stephen Hawking
No one undertakes research in physics with the intention of winning a prize. It is the joy of discovering something no one knew before. -- Stephen Hawking
What you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise. -- Stephen Hawking
My three children have brought me great joy. -- Stephen Hawking
I have noticed that even those who assert that everything is predestined and that we can change nothing about it still look both ways before they cross the street -- Stephen Hawking
Do you ever wonder how much deeper the ocean would be without sponges? -- Stephen Hawking
As often happens in science, discoveries are made in the pursuit of an elusive (and sometimes nonexistent) goal. -- Stephen Hawking
To boldly go where no one has gone before -- Stephen Hawking
I wouldn't be here today if it were not for the NHS. I have received a large amount of high-quality treatment without which I would not have survived. -- Stephen Hawking
Someone told me that each equation I included in the book would halve the sales. -- Stephen Hawking
Some scientists think it may be possible to capture a wormhole and enlarge it many trillions of times to make it big enough for a human or even a spaceship to enter. -- Stephen Hawking
The meaning in life is not out there but inbetween our ears. In many ways this makes us the lords of creation. -- Stephen Hawking
Intelligence is the ability to adapt to change. -- Stephen Hawking
Mankind's greatest achievements have come about by talking and its greatest failures by not talking. It doesn't have to be like this. -- Stephen Hawking
Nuclear weapons need large facilities, but genetic engineering can be done in a small lab. You can't regulate every lab in the world. The danger is that either by accident or design, we create a virus that destroys us. -- Stephen Hawking
The life we have on Earth must have spontaneously generated itself. It must therefore be possible for life to generate spontaneously elsewhere in the universe. -- Stephen Hawking
In real time, the universe has a beginning and an end at singularities that form a boundary to space-time and at which the laws of science break down. -- Stephen Hawking
I don't think the human race will survive the next thousand years, unless we spread into space. -- Stephen Hawking
People who boast about their I.Q. are losers. -- Stephen Hawking
All the known particles in the universe can be divided into two groups: particles of spin ½, which make up the matter in the universe, and particles of spin 0, 1, and 2, which, as we shall see, give rise to forces between the matter particles. -- Stephen Hawking
One could imagine such technology outsmarting financial markets, out-inventing human researchers, out-manipulating human leaders, and developing weapons we cannot even understand. -- Stephen Hawking
It's time to commit to finding the answer, to search for life beyond Earth. Mankind has a deep need to explore, to learn, to know. We also happen to be sociable creatures. It is important for us to know if we are alone in the dark. -- Stephen Hawking
The cyclic universe theory predicts no gravitational waves from the early universe. -- Stephen Hawking
I think the universe was spontaneously created out of nothing, according to the laws of science. It has no beginning and no end. -- Stephen Hawking
The universe does not behave according to our pre-conceived ideas. It continues to surprise us. -- Stephen Hawking
There ought to be something very special about the boundary conditions of the universe and what can be more special than that there is no boundary? -- Stephen Hawking
A lot of prizes have been awarded for showing the universe is not as simple as we might have thought. -- Stephen Hawking
While physics and mathematics may tell us how the universe began, they are not much use in predicting human behavior because there are far too many equations to solve. I'm no better than anyone else at understanding what makes people tick, particularly women. -- Stephen Hawking
... only in the few universes that are like ours would intelligent beings develop and ask the question: "Why is the universe the way we see it?" The answer is then simple: If it had been any different, we would not be here! -- Stephen Hawking
Science could predict that the universe must have had a beginning. -- Stephen Hawking
The Ionian idea that the universe is not human-centered was a milestone -- Stephen Hawking
It now appears that the way the universe began can indeed be determined, using imaginary time. -- Stephen Hawking
One could say: "The boundary condition of the universe is that it has no boundary." The universe would be completely self-contained and not affected by anything outside itself. It would neither be created nor destroyed. It would just BE. -- Stephen Hawking
Before 1915, space and time were thought of as a fixed arena in which events took place, but which was not affected by what happened in it. Space and time are now dynamic quantities ... space and time not only affect but are also affected by everything that happens in the universe. -- Stephen Hawking
The large-scale homogeneity of the universe makes it very difficult to believe that the structure of the universe is determined by anything so peripheral as some complicated molecular structure on a minor planet orbiting a very average star in the outer suburbs of a fairly typical galaxy. -- Stephen Hawking
I want to know why the universe exists, why there is something greater than nothing. -- Stephen Hawking
We are only the temporary custodians of the particles which we are made of. They will go on to lead a future existence in the enormous universe that made them -- Stephen Hawking
Before we understood science, it was natural to believe that God created the universe, but now science offers a more convincing explanation." "What I meant by 'we would know the mind of God' is we would know everything that God would know if there was a God, but there isn't. I'm an atheist. -- Stephen Hawking
In fact, according to quantum physics, each particle has some probability of being found anywhere in the universe. -- Stephen Hawking
The most remarkable property of the universe is that it has spawned creatures able to ask questions. -- Stephen Hawking
The Universe in a Nutshell -- Stephen Hawking
In an infinite universe, every point can be regarded as the center, because every point has an infinite number of stars on each side of it. The -- Stephen Hawking
The universe is not indifferent to our existence - it depends on it. -- Stephen Hawking
Because there is a law such as gravity, the universe can and will create itself from nothing. -- Stephen Hawking
It would be very difficult to explain why the universe should have begun in just this way, except as the act of a God who intended to create beings like us -- Stephen Hawking
I first had the idea of writing a popular book about the universe in 1982. My intention was partly to earn money to pay my daughter's school fees. -- Stephen Hawking
We think that life develops spontaneously on Earth, so it must be possible for life to develop on suitable planets elsewhere in the universe. But we don't know the probability that a planet develops life. -- Stephen Hawking
Look up at the stars and not down at your feet. Try to make sense of what you see, and wonder about what makes the universe exist. Be curious. -- Stephen Hawking
I believe the universe is governed by the laws of science. The laws may have been decreed by God, but God does not intervene to break the laws. -- Stephen Hawking
We find ourselves in a bewildering world. We want to make sense of what we see around us and to ask: What is the nature of the universe? What is our place in it and where did it and we come from? Why is it the way it is? -- Stephen Hawking
We see the universe the way it is because we exist. -- Stephen Hawking
If we ever do find a complete theory of the universe, it would be a great triumph of human reason but it wouldn't leave much for us to do. We need an intellectual challenge. -- Stephen Hawking
The idea that we are alone in the universe seems to me completely implausible and arrogant, considering the number of planets and stars that we know exist, it's extremely unlikely that we are the only form of evolved life. -- Stephen Hawking
But the idea that God might want to change his mind is an example of the fallacy, pointed out by St. Augustine, of imagining God as a being existing in time: time is a property only of the universe that God created. -- Stephen Hawking
The microwave background indicated that the universe had had a hot, dense stage in the past. -- Stephen Hawking
Up until the 1920s, everyone thought the universe was essentially static and unchanging in time. -- Stephen Hawking
The boundary condition of the universe is that it has no boundary. -- Stephen Hawking
The most important point: that the universe is governed by a set of rational laws that we can discover and understand. -- Stephen Hawking
You cannot understand the glories of the universe without believing there is some Supreme Power behind it. -- Stephen Hawking
Being confined to a wheelchair doesn't bother me as my mind is free to roam the universe, but it felt wonderful to be weightless. -- Stephen Hawking
If you understand the universe, you control it, in a way. -- Stephen Hawking
Many people find the universe confusing - it's not. -- Stephen Hawking
I think the discovery of supersymmetric partners for the known particles would revolutionize our understanding of the universe. -- Stephen Hawking
There is nothing bigger or older than the universe. -- Stephen Hawking
The universe is governed by science. But science tells us that we can't solve the equations, directly in the abstract. -- Stephen Hawking
if you take a positivist position, as I do, questions about reality don't have any meaning. All one can ask is whether imaginary time is useful in formulating mathematical models that describe what we observe. -- Stephen Hawking
There is no way that we can predict the weather six months ahead beyond giving the seasonal average -- Stephen Hawking
Maybe I don't have the most common kind of motor neuron disease, which usually kills in two or three years. -- Stephen Hawking
If time travel is possible, where are the tourists from the future? -- Stephen Hawking
As Irving Good realised in 1965, machines with superhuman intelligence could repeatedly improve their design even further, triggering what Vernor Vinge called a 'singularity.' -- Stephen Hawking
What I'd really like to control is not machines, but people. -- Stephen Hawking
I may contradict myself, but at least I don't contradict myself. -- Stephen Hawking
The missing link in cosmology is the nature of dark matter and dark energy. -- Stephen Hawking
Cosmology is a rapidly advancing field. -- Stephen Hawking
Only black holes of very low mass would emit a significant amount of radiation. -- Stephen Hawking
Bodies such as stars or black holes cannot just appear out of nothing. But a whole universe can. -- Stephen Hawking
Thus, in a sense, we are all doomed. even if we stay away from black holes -- Stephen Hawking
It is no good getting furious if you get stuck. What I do is keep thinking about the problem but work on something else. Sometimes it is years before I see the way forward. In the case of information loss and black holes, it was 29 years. -- Stephen Hawking
My discovery that black holes emit radiation raised serious problems of consistency with the rest of physics. I have now resolved these problems, but the answer turned out to be not what I expected. -- Stephen Hawking
Black holes are not really black after all: they glow like a hot body, and the smaller they are, the more they glow. -- Stephen Hawking
I'm a child myself, in the sense that I'm still looking. Children are fascinated by black holes and ask me questions. I find they soon get the idea if it is explained in nontechnical language. -- Stephen Hawking
Does general relativity predict that our universe should have had a big bang, a beginning of time? -- Stephen Hawking
Chaos, when left alone, tends to multiply. -- Stephen Hawking
I have sold more books on physics than Madonna has on sex. -- Stephen Hawking
What I meant by 'we would know the mind of God' is, we would know everything that God would know, if there were a God. Which there isn't. I'm an atheist. -- Stephen Hawking
"Sooner or later disasters such as an asteroid collision or a nuclear war could wipe us all out, But once we spread out into space and establish independent colonies, our future should be safe." -- Stephen Hawking
In 1956 two American physicists, Tsung-Dao Lee and Chen Ning Yang, suggested that the weak force does not in fact obey the symmetry P. -- Stephen Hawking
My ideal role would be a baddie in a James Bond film. I think the wheelchair and the computer voice would fit the part. -- Stephen Hawking
In 1687, when Sir Isaac Newton published his Philosophiae Naturalis Principia Mathematica, probably the most important single work ever published in the physical sciences. -- Stephen Hawking
With genetic engineering, we will be able to increase the complexity of our DNA, and improve the human race. But it will be a slow process, because one will have to wait about 18 years to see the effect of changes to the genetic code. -- Stephen Hawking
I think the brain is essentially a computer and consciousness is like a computer program. It will cease to run when the computer is turned off. Theoretically, it could be re-created on a neural network, but that would be very difficult, as it would require all one's memories. -- Stephen Hawking
In my school, the brightest boys did math and physics, the less bright did physics and chemistry, and the least bright did biology. I wanted to do math and physics, but my father made me do chemistry because he thought there would be no jobs for mathematicians. -- Stephen Hawking
We live in a bewildering world. -- Stephen Hawking
In the classical theory of gravity, which is based on real space-time, there are only two possible ways the universe can behave: either it has existed for an infinite time, or else it had a beginning at a singularity at some finite time in the past. -- Stephen Hawking
We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet, -- Stephen Hawking
However difficult life may seem, there is always something you can do and succeed at. -- Stephen Hawking
It is generally recognised that women are better than men at languages, personal relations and multi-tasking, but less good at map-reading and spatial awareness. It is therefore not unreasonable to suppose that women might be less good at mathematics and physics. -- Stephen Hawking
The earth was initially very hot and without an atmosphere. In the course of time it cooled and acquired an atmosphere from the emission of gases from the rocks. -- Stephen Hawking
I think [contacting an alien civilization] would be a disaster. The extraterrestrials would probably be far in advance of us. The history of advanced races meeting more primitive people on this planet is not very happy, and they were the same species. I think we should keep our heads low. -- Stephen Hawking
Each exists for but a short time, and in that time explore but a small part of the whole universe. -- Stephen Hawking
When I was first diagnosed with ALS, I was given two years to live. Now 45 years later, I am doing pretty well. -- Stephen Hawking
The victim should have the right to end his life, if he wants. But I think it would be a great mistake. However bad life may seem, there is always something you can do, and succeed at. While there's life, there is hope. -- Stephen Hawking
In my mind, I am free. -- Stephen Hawking
Half the battle is just showing up. -- Stephen Hawking
Our minds work in real time, which begins at the Big Bang and will end, if there is a Big Crunch - which seems unlikely, now, from the latest data showing accelerating expansion. Consciousness would come to an end at a singularity. -- Stephen Hawking
There is no prescribed route to follow to arrive at a new idea. You have to make the intuitive leap. -- Stephen Hawking
I did not expect to survive that long. Yet two years had gone by and I was not that much worse. In fact, things were going rather well for me and I had gotten engaged to a very nice girl, Jane Wilde. But in order to get married, I needed a job, and in order to get a job, I needed a Ph.D. -- Stephen Hawking
However bad life may seem, where there is life, there is hope. -- Stephen Hawking
Money is not everything. There's Master card & Visa. -- Stephen Hawking
I believe there are no questions that science can't answer about a physical universe. -- Stephen Hawking
Today, we commit to this next great leap into the cosmos because we're human, and our nature is to fly. -- Stephen Hawking
Hang in there, retirement is only thirty years away! -- Stephen Hawking
I believe things cannot make themselves impossible. -- Stephen Hawking
At times, I get very lonely because people are afraid to talk to me or don't wait for me to write a response. I'm shy and tongue-tied at times. I find it difficult to talk to people who I don't know. -- Stephen Hawking
A scientific law is not a scientific law if it only holds when some supernatural being decides to let things run and not intervene. In -- Stephen Hawking
Rabbits have white tails in order that it be easy for us to shoot them. -- Stephen Hawking
Scientists tend to risk theories they admire -- Stephen Hawking
If I knew what was going to happen in ten years I would do it now. I just follow my nose. -- Stephen Hawking
(The Catholic Church, on the other hand, seized on the big bang model and in 1951 officially pronounced it to be in accordance with the Bible.) There -- Stephen Hawking
To understand recursion, one must first understand recursion. -- Stephen Hawking
Among physicists, I'm respected I hope. -- Stephen Hawking
Religion believes in miracles, but these aren't compatible with science. -- Stephen Hawking
Now, radical forward thinking is offering hope for the future: Replacement body parts to order. A team of scientists in California believe that if you can design them on a computer, you should be able to print them out. -- Stephen Hawking
I thought Eddie Redmayne portrayed me very well ... At times I thought he was me. -- Stephen Hawking
Real gravitons make up what classical physicists would call gravitational waves, which are very weak - and so difficult to detect that they have not yet been observed. The -- Stephen Hawking
It's the gravity that shapes the large scale structure of the universe, even though it is the weakest of four categories of forces. -- Stephen Hawking
It appeared that each observer must have his own measure of time, as recorded by a clock carried with him, and that identical clocks carried by different observers would not necessarily agree. -- Stephen Hawking
If a star were a grain of salt, you could fit all the stars visible to the naked eye on a teaspoon, but all the stars in the universe would fill a ball more than eight miles wide. -- Stephen Hawking
There are grounds for cautious optimism that we may now be near the end ofthe search for the ultimate laws of nature. -- Stephen Hawking
Mass: The quantity of matter in a body; its inertia, or resistance to acceleration. -- Stephen Hawking
Nothing is fool-proof to a sufficiently talented fool. -- Stephen Hawking
The fastest manned vehicle in history was Apollo 10. It reached 25,000 mph. -- Stephen Hawking
I'm here to chew gum and kick some ass, and I'm all out of gum. -- Stephen Hawking
Newton's time it was possible for an educated person to have a grasp of the whole of human knowledge, at least in outline. But since then, the pace of the development of science has made this impossible. -- Stephen Hawking
When I get to heaven I'm gonna find the guy in charge of the weather and kick his rear. -- Stephen Hawking
The wise never marry, and when they marry they become otherwise. -- Stephen Hawking
It also meant that whenever a body is not acted on by any force, it will keep on moving in a straight line at the same speed. -- Stephen Hawking
Life on Earth is at the ever-increasing risk of being wiped out by a disaster, such as sudden global nuclear war, a genetically engineered virus or other dangers we have not yet thought of. -- Stephen Hawking
The whole history of science has been the gradual realization that events do not happen in an arbitrary manner, but that they reflect a certain underlying order, which may or may not be divinely inspired. -- Stephen Hawking
In the last 200 years the population of our planet has grown exponentially, at a rate of 1.9% per year. If it continued at this rate, with the population doubling every 40 years, by 2600 we would all be standing literally shoulder to shoulder. -- Stephen Hawking
We won't know for a few years. -- Stephen Hawking
There was a young lady of Wight Who travelled much faster than light. She departed one day, In a relative way, And arrived on the previous night. The point is that the theory of relativity says that there is no unique measure of time that all observers will agree on. -- Stephen Hawking
a good theory is characterized by the fact that it makes a number of predictions that could in principle be disproved or falsified by observation. -- Stephen Hawking
A model is a good model if first it interprets a wide range of observations in terms of a simple and elegant model, and second if the model makes definite predictions that can be tested, and possibly falsified, by observation. -- Stephen Hawking
In 1992 came the first confirmed observation of a planet orbiting a star other than our sun. -- Stephen Hawking
It [AI] would take off on its own and redesign itself at an ever increasing rate. Humans, who are limited by slow biological evolution, couldn't compete and would be superseded. -- Stephen Hawking
You can't regulate every lab in the world. -- Stephen Hawking
Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill. -- Stephen Hawking
We waste time, so you don't have to. -- Stephen Hawking
Save water. Shower with your girlfriend. -- Stephen Hawking
Work gives you meaning and purpose and life is empty without it. -- Stephen Hawking
So great a contribution to physics was Two New Sciences that scholars have long maintained that the book anticipated Isaac Newton's laws of motion. -- Stephen Hawking
The origin of the name is an enigmatic quotation from James Joyce: "Three quarks for Muster Mark! -- Stephen Hawking
Nothing is better than reading and gaining more and more knowledge. -- Stephen Hawking
Science is not only a disciple of reason but, also, one of romance and passion. -- Stephen Hawking
As scientists, we step on the shoulders of science, building on the work that has come before us - aiming to inspire a new generation of young scientists to continue once we are gone. -- Stephen Hawking
do we really have reason to believe that an objective reality exists? -- Stephen Hawking
I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road. -- Stephen Hawking
I think computer viruses should count as life ... I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image. -- Stephen Hawking
In the past, there was active discrimination against women in science. That has now gone, and although there are residual effects, these are not enough to account for the small numbers of women, particularly in mathematics and physics. -- Stephen Hawking
I was not a good student. I did not spend much time at college; I was too busy enjoying myself. -- Stephen Hawking
When something is made idiot proof, they will just make better idiots. -- Stephen Hawking
It is all right to make mistakes; nothing is perfect because with perfection, we would not exist. -- Stephen Hawking
I don't believe that the ultimate theory will come by steady work along existing lines. We need something new. We can't predict what that will be or when we will find it because if we knew that, we would have found it already! -- Stephen Hawking
I don't have much positive to say about motor neurone disease. But it taught me not to pity myself because others were worse off, and to get on with what I could still do. -- Stephen Hawking
Do you believe in first love - or should I pass by again? -- Stephen Hawking
If we want to travel into the future, we just need to go fast. Really fast. And I think the only way we're ever likely to do that is by going into space. -- Stephen Hawking
Even if it turns out that time travel is impossible, it is important that we understand why it is impossible. -- Stephen Hawking
There could be whole antiworlds and antipeople made out of antiparticles. However, if you meet your antiself, don't shake hands! You would both vanish in a great flash of light. -- Stephen Hawking
There could be shadow galaxies, shadow stars, and even shadow people. -- Stephen Hawking
Prof Stephen Hawking, one of Britain's pre-eminent scientists, has said that efforts to create thinking machines pose a threat to our very existence. He told the BBC:The development of full artificial intelligence could spell the end of the human race. -- Stephen Hawking
People won't have time for you if you are always angry or complaining. -- Stephen Hawking
Scientists have become the bearers of the torch of discovery in our quest for knowledge. -- Stephen Hawking
I don't fear God- I fear His believers ... -- Stephen Hawking
You can't afford to be disabled in spirit as well as physically. People won't have time for you. -- Stephen Hawking
In a world that is in chaos politically, socially and environmentally, how can the human race sustain another 100 years? -- Stephen Hawking
The human race may be the only intelligent beings in the galaxy. -- Stephen Hawking
In this way, Edwin Hubble worked out the distances to nine different galaxies. We now know that our galaxy is only one of some hundred thousand million that can be seen using modern telescopes, each galaxy itself containing some hundred thousand million stars. -- Stephen Hawking
(The story that Newton was inspired by an apple hitting his head is almost certainly apocryphal. All Newton himself ever said was that the idea of gravity came to him as he sat "in a contemplative mood" and "was occasioned by the fall of an apple.") -- Stephen Hawking
There is no unique picture of reality. -- Stephen Hawking
In effect, we have redefined the task of science to be the discovery of laws that will enable us to predict events up to the limits set by the uncertainty principle. -- Stephen Hawking
Succeed in spite of management. -- Stephen Hawking
Without imperfection, you or I would not exist. -- Stephen Hawking
Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space. -- Stephen Hawking
It's a pity that nobody has found an exploding black hole. If they had, I would have won a Nobel prize. -- Stephen Hawking
Disability need not be an obstacle to success. -- Stephen Hawking
even if there were events before the big bang, one could not use them to determine what would happen afterward, because predictability would break down at the big bang. -- Stephen Hawking
The fact that no one understands you doesn't mean you're an artist. -- Stephen Hawking
All my adult life people have been helping me. -- Stephen Hawking
We've created life in our own image. -- Stephen Hawking
The Simpsons is the best thing on American television. -- Stephen Hawking
Time travel was once considered scientific heresy, and I used to avoid talking about it for fear of being labelled a 'crank.' -- Stephen Hawking
The Planck satellite may detect the imprint of the gravitational waves predicted by inflation. This would be quantum gravity written across the sky. -- Stephen Hawking
Every man should marry. After all, happiness is not the only thing in life. -- Stephen Hawking
(According to some accounts, a journalist told Eddington in the early 1920s that he had heard there were only three people in the world who understood general relativity. Eddington paused, then replied, "I am trying to think who the third person is.") -- Stephen Hawking
Never scrub your arse with a wire brush. -- Stephen Hawking
I am just a child who has never grown up. I still keep asking these 'how' and 'why' questions. Occasionally, I find an answer. -- Stephen Hawking
I think we have a good chance of surviving long enough to colonize the solar system. -- Stephen Hawking
Sometimes I wonder if I'm as famous for my wheelchair and disabilities as I am for my discoveries. -- Stephen Hawking
An elipse is an elongated circle -- Stephen Hawking
The human capacity for guilt is such that people can always find ways to blame themselves -- Stephen Hawking
We are in danger of destroying ourselves by our greed and stupidity. We cannot remain looking inwards at ourselves on a small and increasingly polluted and overcrowded planet. -- Stephen Hawking
The downside of my celebrity is that I cannot go anywhere in the world without being recognized. It is not enough for me to wear dark sunglasses and a wig. The wheelchair gives me away. -- Stephen Hawking
To confine our attention to terrestrial matters would be to limit the human spirit. -- Stephen Hawking
When two's company, three's the result! -- Stephen Hawking
Time can behave like another direction in space under extreme conditions. -- Stephen Hawking
It is a waste of time to be angry about my disability. One has to get on with life and I haven't done badly. People won't have time for you if you are always angry or complaining. - Stephen Hawking -- Stephen Hawking
If everything in the universe depends upon everything else in a fundamental way, it might be impossible to get close to a full solution by investigating parts of the problem in isolation. -- Stephen Hawking
If so, we might be able to use them for rapid travel around the galaxy or travel back in time. Of course, we have not seen anyone from the future (or have we?) but I discuss a possible explanation for this. -- Stephen Hawking
Only a very few would allow creatures like us to exist. Thus our presence selects out from this vast array only these universes that are compatible without existence. Although we are puny and insignificant on the scale of the cosmos, this makes us in a sense, the lords of creation. -- Stephen Hawking
The past, like the future, is indefinite and exists only as a spectrum of possibilities. -- Stephen Hawking
There are too many accidents that can befall life on a single planet. -- Stephen Hawking
God not only plays dice, He also sometimes throws the dice where they cannot be seen. -- Stephen Hawking
Although in principle we know the equations that govern the whole of biology, we have not been able to reduce the study of human behavior to a branch of applied mathematics. -- Stephen Hawking
In space no one can hear you scream; and in a black hole, no one can see you disappear. -- Stephen Hawking
One has a singularity contained within a region of space-time known as a black hole. -- Stephen Hawking
I would rather be right than rigorous. -- Stephen Hawking
Feynman once wrote, I think I can safely say that nobody understands quantum mechanics. -- Stephen Hawking
This means it will take about a thousand million million million million years for the earth to run into the sun, so there's no immediate cause for worry! -- Stephen Hawking
Although quantum mechanics has been around for nearly 70 years, it is still not generally understood or appreciated, even by those that use it to do calculations. -- Stephen Hawking
Although September 11 was horrible, it didn't threaten the survival of the human race, like nuclear weapons do. -- Stephen Hawking
It matters if you don't just give up. -- Stephen Hawking
If one is physically disabled, one cannot afford to be *psychologically* disabled as well. -- Stephen Hawking
The last chapter discussed why we see time go forward: why disorder increases and why we remember the past but not the future. -- Stephen Hawking
If at first you don't succeed, try management. -- Stephen Hawking
Real science can be far stranger than science fiction and much more satisfying. -- Stephen Hawking
I'm never any good in the morning. It is only after four in the afternoon that I get going. -- Stephen Hawking
The moment you understand the whole Universe, is the moment you slightly begin to understand the way God's mind works -- Stephen Hawking
Women. They are a complete mystery. -- Stephen Hawking
Time travel may be possible, but it is not practical. -- Stephen Hawking
I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark. -- Stephen Hawking
What is important is that we have the ability to create. -- Stephen Hawking
We live in the most probable of all possible worlds. -- Stephen Hawking
Galileo , perhaps more than any other single person, was responsible for the birth of modern science. -- Stephen Hawking
If I had a time machine, I'd visit Marilyn Monroe in her prime or drop in on Galileo as he turned his telescope to the heavens. -- Stephen Hawking
I had no desire to share the fate of Galileo, with whom I feel a strong sense of identity, partly because of the coincidence of having been born exactly 300 years after his death! -- Stephen Hawking
I don't want to write an autobiography because I would become public property with no privacy left. -- Stephen Hawking
I hope I have helped to raise the profile of science and to show that physics is not a mystery but can be understood by ordinary people. -- Stephen Hawking
Government works best under the glare of public scrutiny. Absent such scrutiny, abuses occur. -- Stephen Hawking
Can God make a stone so heavy that he can't lift it? -- Stephen Hawking
Is god omnipotent ? If he is, can he create a rock so heavy he can't lift it ? -- Stephen Hawking
Once I wept for I had no shoes. Then I met a man with no feet, so I took his shoes. I mean, it wasn't as if he was going to need them. -- Stephen Hawking
The eventual goal of science is to provide a single theory that describes the whole universe. -- Stephen Hawking
'The Simpsons' appearances were great fun. But I don't take them too seriously. I think 'The Simpsons' have treated my disability responsibly. -- Stephen Hawking
The Paralympic Games is about transforming our perception of the world. -- Stephen Hawking
Latest survey shows that 3 out of 4 people make up 75% of the world's population. -- Stephen Hawking
On what he thinks about all day
Women. They are a complete mystery. -- Stephen Hawking
Cambridge is one of the best universities in the world, especially in my field. -- Stephen Hawking
Computers double their performance every month. -- Stephen Hawking
In Britain, like most of the developed world, stem-cell research is regarded as a great opportunity. America will be left behind if it doesn't change policy. -- Stephen Hawking
Maybe my viriety is due to bad absorption of vitamins. -- Stephen Hawking
The thing about smart people is that they seem like crazy people to dumb people. -- Stephen Hawking
We are entering an increasingly dangerous period of our history. But I'm an optimist. -- Stephen Hawking
The laws of science do not distinguish between the past and the future. -- Stephen Hawking
One is always a long way from solving a problem until one actually has the answer. -- Stephen Hawking
Bodies like the earth are not made to move on curved orbits by a force called gravity; instead, they follow the nearest thing to a straight path in a curved space, which is called a geodesic. A geodesic is the shortest (or longest) path between two nearby points. -- Stephen Hawking
What lies north of the North Pole? -- Stephen Hawking
Our very existence imposes rules determining from where and at what time it is possible for us to observe the universe. That is, the fact of our being restricts the characteristics of the kind of environment in which we find ourselves. That principle is called the weak anthropic principle. -- Stephen Hawking
FIGURE 3.1 Stars -- Stephen Hawking
We could call order by the name of God, but it would be an impersonal God. There's not much personal about the laws of physics. -- Stephen Hawking
God abhors a naked singularity. -- Stephen Hawking
Although I cannot move and I have to speak through a computer, in my mind I am free. -- Stephen Hawking
Some individuals are better able than others to draw the right conclusions about the world about them and act accordingly. These individuals will be more likely to survive and reproduce so their pattern of behaviour and thought will become dominant -- Stephen Hawking
There is no such thing as a standard, run-of-the-mill, human being. -- Stephen Hawking
What place, then, for a creator? -- Stephen Hawking
I believe in universal health care. And I am not afraid to say so. -- Stephen Hawking
It is hard to imagine how free will can operate if our behavior is determined by physical law, so it seems that we are no more than biological machines and that free will is just an illusion. -- Stephen Hawking
Look up at the stars, not down at your feet. -- Stephen Hawking
I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in science. -- Stephen Hawking
the astronaut David R. Scott performed the feather and lead weight experiment and found that indeed they did hit the ground at the same time. -- Stephen Hawking
It is impossible to imagine a four-dimensional space. I personally find it hard enough to visualize a three-dimensional space! -- Stephen Hawking
Using e-mail, I can communicate with scientists all over the world. -- Stephen Hawking
Eternity is a long time, especially towards the end. -- Stephen Hawking
The entropy of an isolated system always increases, and that when two systems are joined together, the entropy of the combined system is greater than the sum of the entropies of the individual systems. -- Stephen Hawking
The voice I use is a very old hardware speech synthesizer made in 1986. I keep it because I have not heard a voice I like better and because I have identified with it. -- Stephen Hawking
When a book was published entitled 100 Authors Against Einstein, he retorted, "If I were wrong, then one would have been enough! -- Stephen Hawking
Theoretical physics is one of the few fields in which being disabled is no handicap - it is all in the mind. -- Stephen Hawking
If any one of about 40 physical qualities had more than slightly different values, life as we know it could not exist ... -- Stephen Hawking
It is extremely important to me to write for children. -- Stephen Hawking
When there's life, there's hope -- Stephen Hawking
Computer viruses are alive. -- Stephen Hawking
We explore because we are human. -- Stephen Hawking
Success in creating AI would be the biggest event in human history. Unfortunately, it might also be the last, unless we learn how to avoid the risks. -- Stephen Hawking
If there were events earlier than this time, then they could not affect what happens at the present time. Their existence can be ignored because it would have no observational consequences. -- Stephen Hawking
Science fiction can be exciting and very gripping, but it doesn't tell us anything about the universe in which we live. -- Stephen Hawking
I'm the archetype of a disabled genius, or should I say a physically challenged genius, to be politically correct. At least I'm obviously physically challenged. Whether I'm a genius is more open to doubt. -- Stephen Hawking
We should seek the greatest value of our action. -- Stephen Hawking
You cannot predict the future. -- Stephen Hawking
I enjoy all forms of music - pop, classical and opera. -- Stephen Hawking
