I have been interested in phenomena involving complexity, diversity and evolution since I was a young boy.

So the old Copenhagen interpretation needs to be generalized, needs to be replaced by something that can be used for the whole universe, and can be used also in cases where there is plenty of...

I think also of my colleagues in elementary particle theory in many lands, and feel that in some measure I am here as a representative of our small, informal, international fraternity.

Sometimes the probabilities are very close to certainties, but they’re never really certainties.

What is especially striking and remarkable is that in fundamental physics a beautiful or elegant theory is more likely to be right than a theory that is inelegant.

I think one can try to reduce the amount of confusion, and also to reduce the amount of nonsense that’s talked about quantum mechanics.

The chaos can act as a magnifier of quantum fluctuations so that they can produce sizable effects in the world around us. But we know that that can happen often.

As a theoretical physicist, I feel at once proud and humble at the thought of the illustrious figures that have preceded me here to receive the greatest of all honors in science, the Nobel prize.

If someone says that he can think or talk about quantum physics without becoming dizzy, that shows only that he has not understood anything whatever about it.

We are driven by the usual insatiable curiosity of the scientist, and our work is a delightful game.

But I don’t actually adopt the point of view that our subjective impression of free will, which is a kind of indeterminacy behavior, comes from quantum mechanical indeterminacy.

If we look at the way the universe behaves, quantum mechanics gives us fundamental, unavoidable indeterminacy, so that alternative histories of the universe can be assigned probability.

Well, I don’t like to get involved in these philosophical issues very much.

But when researchers at Bell Labs discovered that static tends to come from particular places in the sky, the whole field of radio astronomy opened up.

In fact any experiment that measures a quantum effect is one in which the quantum effect is aligned with the behavior of some heavy, macroscopic object; that’s how we measure it.

What I try to do in the book is to trace the chain of relationships running from elementary particles, fundamental building blocks of matter everywhere in the universe, such as quarks, all the way to...

Enthusiasm is followed by disappointment and even depression, and then by renewed enthusiasm.

Is it imaginable that in the 13 or 14 billion years before human life appeared there was no quantum mechanics? That is ludicrous.

When you think you’re listening to several conversations at once, they tell me, you may really simply be time sharing – that is, listening a little bit to this one, a little bit to that...

For me, the study of these laws is inseparable from a love of Nature in all its manifestations.

Now, what that means is that there is fundamental indeterminacy from quantum mechanics, but besides that there are other sources of effective indeterminacy.

You know, there was a time, just before I started to study physical science, when astronomers thought that systems such as we have here in the solar system required a rare triple collision of stars.

Hugh Everett’s work has been described by many people in terms of many worlds, the idea being that every one of the various alternative histories, branching histories, is assigned some sort of reality.

Of course the word chaos is used in rather a vague sense by a lot of writers, but in physics it means a particular phenomenon, namely that in a nonlinear system the outcome is often...

I am frequently astonished that it so often results in correct predictions of experimental results.

Our planet doesn’t seem to be the result of anything very special.

I do not keep up with the details of particle physics.

Planets are too dim to be detected with existing equipment, far away, except in these very special circumstances where they’re seen by their gravitational effect.