According to 'M' theory, ours is not the only universe. Instead, 'M' theory predicts that a great many universes were created out… — Stephen Hawking Copy Share Image
Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. — Stephen Hawking Copy Share Image
The missing link in cosmology is the nature of dark matter and dark energy. — Stephen Hawking Copy Share Image
I think the discovery of supersymmetric partners for the known particles would revolutionize our understanding of the universe. — Stephen Hawking Copy Share Image
The cyclic universe theory predicts no gravitational waves from the early universe. — Stephen Hawking Copy Share Image
Only black holes of very low mass would emit a significant amount of radiation. — Stephen Hawking Copy Share Image
It's the gravity that shapes the large scale structure of the universe, even though it is the weakest of four categories of… — Stephen Hawking Copy Share Image
It's a pity that nobody has found an exploding black hole. If they had, I would have won a Nobel prize. — Stephen Hawking Copy Share Image
There are no black holes - in the sense of regimes from which light can't escape to infinity. There are however apparent… — Stephen Hawking Copy Share Image
When we understand string theory, we will know how the universe began. It won't have much effect on how we live, but… — Stephen Hawking Copy Share Image
The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful.… — Stephen Hawking Copy Share Image
Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. No matter… — Stephen Hawking Copy Share Image
It was Einstein's dream to discover the grand design of the universe, a single theory that explains everything. However, physicists in Einstein's… — Stephen Hawking Copy Share Image
My discovery that black holes emit radiation raised serious problems of consistency with the rest of physics. I have now resolved these… — Stephen Hawking Copy Share Image
For years, my early work with Roger Penrose seemed to be a disaster for science. It showed that the universe must have… — Stephen Hawking Copy Share Image
“The electromagnetic attraction between negatively charged electrons and positively charged protons in the nucleus causes the electrons to orbit the nucleus of… — Stephen Hawking Copy Share Image
“Yet if there really were a complete unified theory, it would also presumably determine our actions—so the theory itself would determine the… — Stephen Hawking Copy Share Image
“Even if there is only one possible unified theory, it is just a set of rules and equations. What is it that… — Stephen Hawking Copy Share Image
If there really is a complete unified theory that governs everything, it presumably also determines your actions. But it does so in… — Stephen Hawking Copy Share Image
If it [the universe] was expanding fairly slowly, the force of gravity would cause it eventually to stop expanding and then to… — Stephen Hawking Copy Share Image
“... if we do discover a complete theory, it should in time be understandable in broad principle by everyone, not just a… — Stephen Hawking Copy Share Image
If what we regard as real depends on our theory, how can we make reality the basis of our philosophy? ...But we… — Stephen Hawking Copy Share Image
I think the next [21st] century will be the century of complexity. We have already discovered the basic laws that govern matter… — Stephen Hawking Copy Share Image
“It turns out to be very difficult to devise a theory to describe the universe all in one go. Instead, we break… — Stephen Hawking Copy Share Image
“The uncertainty principle signaled an end to Laplace's dream of a theory of science, a model of the universe that would be… — Stephen Hawking Copy Share Image
“Roger Penrose and I showed that Einstein’s general theory of relativity implied that the universe must have a beginning and, possibly, an… — Stephen Hawking Copy Share Image
I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in… — Stephen Hawking Copy Share Image
So great a contribution to physics was Two New Sciences that scholars have long maintained that the book anticipated Isaac Newton's laws… — Stephen Hawking Copy Share Image
Some people would claim that things like love, joy and beauty belong to a different category from science and can't be described… — Stephen Hawking Copy Share Image
Although quantum mechanics has been around for nearly 70 years, it is still not generally understood or appreciated, even by those that… — Stephen Hawking Copy Share Image
“Up to about thirty years ago, it was thought that protons and neutrons were “elementary” particles, but experiments in which protons were… — Stephen Hawking Copy Share Image
If we do discover a complete theory, it should be in time understandable in broad principle by everyone. Then we shall all,… — Stephen Hawking Copy Share Image
While physics and mathematics may tell us how the universe began, they are not much use in predicting human behavior because there… — Stephen Hawking Copy Share Image
Although almost every theoretical physicist agrees with my prediction that a black hole should glow like a hot body, it would be… — Stephen Hawking Copy Share Image
Even if there is only one possible unified theory, it is just a set of rules and equations. What is it that… — Stephen Hawking Copy Share Image
There could be whole antiworlds and antipeople made out of antiparticles. However, if you ever meet your antiself, don't shake hands! You… — Stephen Hawking Copy Share Image
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 Copy Share
The human race does not have a very good record of intelligent behavior. — Stephen Hawking Copy Share
“We have finally found something that doesn’t have a cause, because there was no time for a cause to exist in. For me this… — Stephen Hawking Copy Share
[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… — Stephen Hawking Copy Share
I believe the simplest explanation is, there is no God. No one created the universe and no one directs our fate. This leads me… — Stephen Hawking Copy Share
The increase of disorder or entropy is what distinguishes the past from the future, giving a direction to time. — Stephen Hawking Copy Share
Most sets of values would give rise to universes that, although they might be very beautiful, would contain no one able to wonder at… — Stephen Hawking Copy Share
There is a fundamental difference between religion, which is based on authority, and science, which is based on observation and reason. Science will win… — Stephen Hawking Copy Share
“In the eighteenth century, philosophers considered the whole of human knowledge, including science, to be their field and discussed questions such as: Did the… — Stephen Hawking Copy Share
A model is a good model if first it interprets a wide range of observations in terms of a simple and elegant model, and… — Stephen Hawking Copy Share
“Empedocles noticed that if you cover the neck before you immerse it, a clepsydra does not fill. He reasoned that something invisible must be… — Stephen Hawking Copy Share
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… — Stephen Hawking Copy Share
I hope I have helped to raise the profile of science and to show that physics is not a mystery but can be understood… — Stephen Hawking Copy Share
![“If it [the universe] was expanding fairly slowly, the force of gravity would cause it eventually to stop expanding and then to start contracting. However, if it was expanding at more than a certain critical rate, gravity would never be strong enough to stop it, and the universe would continue to…” quote by Stephen Hawking](https://sms4smile.com/quotes/i/853/stephen-hawking-389_causes_if-it-the-universe-was-expanding-fairly_691971.jpg)
![“I think the next [21st] century will be the century of complexity. We have already discovered the basic laws that govern matter and understand all the normal situations. We don't know how the laws fit together, and what happens under extreme conditions. But I expect we will find a complete unified…” quote by Stephen Hawking](https://sms4smile.com/quotes/i/108/stephen-hawking-389_21st-century_i-think-the-next-21st-century-will-be-th_251313.jpg)
