The future of mankind is going to be decided within the next two generations, and there are two absolute requisites: We must aim at a stable-state society [with limited population growth] and the destruction of...

Discovery consists of looking at the same thing as everyone else and thinking something different.

It is because I know all that science can bring to the world that I shall continue my efforts to ensure that it contributes to the happiness of all men, whether they be white, black,...

It was quite the most incredible event that has ever happened to me in my life. It was almost as incredible as if you fired a 15-inch shell at a piece of tissue paper and...

If my efforts have led to greater success than usual, this is due, I believe, to the fact that during my wanderings in the field of medicine, I have strayed onto paths where the gold...

I think that the formation of [DNA’s] structure by Watson and Crick may turn out to be the greatest developments in the field of molecular genetics in recent years.

[In the case of research director, Willis R. Whitney, whose style was to give talented investigators as much freedom as possible, you may define ‘serendipity’ as] the art of profiting from unexpected occurrences. When you...

The most striking impression was that of an overwhelming bright light. I had seen under similar conditions the explosion of a large amount—100 tons—of normal explosives in the April test, and I was flabbergasted by...

Mathematics began to seem too much like puzzle solving. Physics is puzzle solving, too, but of puzzles created by nature, not by the mind of man.

The progress of science has always been the result of a close interplay between our concepts of the universe and our observations on nature. The former can only evolve out of the latter and yet...

In science there is and will remain a Platonic element which could not be taken away without ruining it. Among the infinite diversity of singular phenomena science can only look for invariants.

I am sure my fellow-scientists will agree with me if I say that whatever we were able to achieve in our later years had its origin in the experiences of our youth and in the...

..the planet is just too small for these developing countries to repeat the economic growth in the same way that the rich countries have done it in the past. We don’t have enough natural resources,...

Cosmology is a science which has only a few observable facts to work with.

I told my three sons stories about germs more than fifty years ago as fanciful bedtime tales.

[Concerning] phosphorescent bodies, and in particular to uranium salts whose phosphorescence has a very brief duration. With the double sulfate of uranium and potassium … I was able to perform the following experiment: One wraps...

Authority in science exists to be questioned, since heresy is the spring from which new ideas flow.

I studied calculus for the first time, which to me was an amazingly empowering experience which I could really see how you could understand all sorts of things, and I decided that chemistry and biology...

Except for the rare cases of plastid inheritance, the inheritance of all known cofactors can be sufficiently accounted for by the presence of genes in the chromosomes. In a word the cytoplasm may be ignored...

I have no doubt that we will be successful in harnessing the sun’s energy. … If sunbeams were weapons of war, we would have had solar energy centuries ago.

Littlewood, on Hardy’s own estimate, is the finest mathematician he has ever known. He was the man most likely to storm and smash a really deep and formidable problem; there was no one else who...

As chemists, we must rename [our] scheme and insert the symbols Ba, La, Ce in place of Ra, Ac, Th. As nuclear chemists closely associated with physics, we cannot yet convince ourselves to make this...

Since the beginning of physics, symmetry considerations have provided us with an extremely powerful and useful tool in our effort to understand nature. Gradually they have become the backbone of our theoretical formulation of physical...

The velocity of light is one of the most important of the fundamental constants of Nature. Its measurement by Foucault and Fizeau gave as the result a speed greater in air than in water, thus...

Lastly, and doubtless always, but particularly at the end of the last century, certain scholars considered that since the appearances on our scale were finally the only important ones for us, there was no point...

As was the case for Nobel’s own invention of dynamite, the uses that are made of increased knowledge can serve both beneficial and potentially harmful ends. Increased knowledge clearly implies increased responsibility.

On examinations: Das Wissen ist der Tad der Forschung.Knowledge is the death of research.Nernst’s motto.

There is also hope that even in these days of increasing specialization there is a unity in the human experience.

From the age of 13, I was attracted to physics and mathematics. My interest in these subjects derived mostly from popular science books that I read avidly. Early on I was fascinated by theoretical physics...

One can still say that quantum mechanics is the key to understanding magnetism. When one enters the first room with this key there are unexpected rooms beyond, but it is always the master key that...

I am one of those who think, like Nobel, that humanity will draw more good than evil from new discoveries.

If a problem is clearly stated, it has no further interest to the physicist.

As science is more and more subject to grave misuse as well as to use for human benefit it has also become the scientist’s responsibility to become aware of the social relations and applications of...

Life is not a miracle. It is a natural phenomenon, and can be expected to appear whenever there is a planet whose conditions duplicate those of the earth.[Stating how planets supporting life cannot be rare.]

That one must do some work seriously and must be independent and not merely amuse oneself in life—this our mother has told us always, but never that science was the only career worth following.

I cannot understand why we idle discussing religion. If we are honest—and scientists have to be—we must admit that religion is a jumble of false assertions, with no basis in reality. The very idea of...

This [discovery of a cell-free yeast extract] will make him famous, even though he has no talent for chemistry.{Comment on German scientist Eduard Buchner who later ironically won a Nobel Prize in Chemistry for this...

Science is a field which grows continuously with ever expanding frontiers. Further, it is truly international in scope. Any particular advance has been preceded by the contributions of those from many lands who have set...

The more important fundamental laws and facts of physical science have all been discovered, and these are now so firmly established that the possibility of their ever being supplanted in consequence of new discoveries is...

The history of the knowledge of the phenomena of life and of the organized world can be divided into two main periods. For a long time anatomy, and particularly the anatomy of the human body,...

Through the discovery of Buchner, Biology was relieved of another fragment of mysticism. The splitting up of sugar into CO2 and alcohol is no more the effect of a ‘vital principle’ than the splitting up...

Will fluorine ever have practical applications?It is very difficult to answer this question. I may, however, say in all sincerity that I gave this subject little thought when I undertook my researches, and I believe...

I think that the event which, more than anything else, led me to the search for ways of making more powerful radio telescopes, was the recognition, in 1952, that the intense source in the constellation...

The fact that Science walks forward on two feet, namely theory and experiment, is nowhere better illustrated than in the two fields for slight contributions to which you have done me the great honour of...

For the admirable gift of himself, and for the magnificent service he renders humanity, what reward does our society offer the scientist? Have these servants of an idea the necessary means of work? Have they...

It would be pleasant to believe that the age of pessimism is now coming to a close, and that its end is marked by the same author who marked its beginning: Aldous Huxley. After thirty...

I looked for it [heavy hydrogen, deuterium] because I thought it should exist. I didn’t know it would have industrial applications or be the basic for the most powerful weapon ever known [the nuclear bomb]...

Mathematics is much more than a language for dealing with the physical world. It is a source of models and abstractions which will enable us to obtain amazing new insights into the way in which...

I decided that life rationally considered seemed pointless and futile, but it is still interesting in a variety of ways, including the study of science. So why not carry on, following the path of scientific...

Physics is becoming so unbelievably complex that it is taking longer and longer to train a physicist. It is taking so long, in fact, to train a physicist to the place where he understands the...