I had a project for my life which involved 10 years of wandering, then some years of medical studies and, if any time was left, the great adventure of physics.

Quarks came in a number of varieties – in fact, at first, only three were needed to explain all the hundreds of particles and the different kinds of quarks – they are called u-type, d-type, s-type.

Buy the ticket, take the ride.

M-theory is the unified theory Einstein was hoping to find.

Tomorrow morning before we depart, I intend to land and see what can be found in the neighborhood.

Philosophers have not kept up with modern developments in science. Particularly physics.

The first amazing fact about gravitation is that the ratio of inertial mass to gravitational mass is constant wherever we have checked it. The second amazing thing about gravitation is how weak it is.

The observer, when he seems to himself to be observing a stone, is really, if physics is to be believed, observing the effects of the stone upon himself.

I want to work; then, as my kids get older, I want to have adventures. I want to visit all their countries: learn and live inside all their cultures.

On life’s vast ocean diversely we sail. Reasons the card, but passion the gale.

I came to China to follow my star and to steep myself in the raw regions of the universe.

It should be possible to explain the laws of physics to a barmaid.

Juvenile crime is not naturally born in the boy, but is largely due either to the spirit of adventure that is in him, to his own stupidity, or to his lack of discipline, according to the nature of the individual.

I’ve always been a bit of a gypsy.

I got to Africa. I got the opportunity to go and learn, not about any animal, but chimpanzees. I was living in my dream world, the forest in Gombe National Park in Tanzania. It was Tanganyika when I began.

To the lover of wilderness, Alaska is one of the most wonderful countries in the world.

I am proud to have been born in Iowa. Through the eyes of a ten-year-old boy, it was a place of adventure and daily discoveries – the wonder of the growing crops, the excitements of the harvest, the journeys to the woods for nuts and hunting, the joys of snowy winters, the comfort of the family fireside, of good food and tender care.

Man can be understood only by ascending from physics, chemistry, biology, and geology. In other words, he is first of all a cosmic problem.

My favorite mode of transport is hot-air ballooning. It’s so graceful to be blown by the wind, to go where the wind takes you.

To the well-organized mind, death is but the next great adventure.

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.

I think we all change each other’s paths. I don’t know which law idea that is in physics, but I don’t think any of us can live without affecting one another.

A good traveler has no fixed plans, and is not intent on arriving.

Working out another system to replace Newton’s laws took a long time because phenomena at the atomic level were quite strange. One had to lose one’s common sense in order to perceive what was happening at the atomic level.

I have enjoyed great satisfaction from my climb of Everest and my trips to the poles. But there’s no doubt that my most worthwhile things have been the building of schools and medical clinics.

After having dispatched a meal, I went ashore, and found no habitation save a single house, and that without an occupant; we had no doubt that the people had fled in terror at our approach, as the house was completely furnished.

I was enjoying myself writing, because I don’t know what’s going to happen when I take a ride around that corner. You don’t know at all what you’re going to find there. That can be thrilling when you read a book, especially when you’re a kid and you’re reading stories.

I’m more of an adventurous type than a relationship type.

While on top of Everest, I looked across the valley towards the great peak Makalu and mentally worked out a route about how it could be climbed. It showed me that even though I was standing on top of the world, it wasn’t the end of everything. I was still looking beyond to other interesting challenges.

I should like to save the Shire, if I could – though there have been times when I thought the inhabitants too stupid and dull for words, and have felt that an earthquake or an invasion of dragons might be good for them.

If a man’s wit be wandering, let him study the mathematics.

I love travelling full stop – so while I’ve had some harrowing instances, I never look at them negatively. Memories are made when you’re travelling – not when you’re chained to your desk.

From the point of view of basic physics, the most interesting phenomena are, of course, in the new places, the places where the rules do not work – not the places where they do work! That is the way in which we discover new rules.

The Edge… there is no honest way to explain it because the only people who really know where it is are the ones who have gone over.

I was scared many times on Everest, but this is all part of the challenge. When I fell down a crevasse, it was pretty scary.

I have often been downcast but never in despair; I regard our hiding as a dangerous adventure, romantic and interesting at the same time. In my diary, I treat all the privations as amusing.

You have a row of dominoes set up; you knock over the first one, and what will happen to the last one is that it will go over very quickly.

Often one postulates that a priori, all states are equally probable. This is not true in the world as we see it. This world is not correctly described by the physics which assumes this postulate.

Golf without bunkers and hazards would be tame and monotonous. So would life.

There could be no fairer destiny for any physical theory than that it should point the way to a more comprehensive theory in which it lives on as a limiting case.

Exploration by real people inspires us.

Marriage is an adventure, like going to war.

New discoveries in science will continue to create a thousand new frontiers for those who still would adventure.

It’s the journey of self, I guess. You start with this kind of loner, outside guy, which a lot of people can relate to, and he goes out into the world.

I went to Princeton specifically to study physics.

Men of age object too much, consult too long, adventure too little, repent too soon, and seldom drive business home to the full period, but content themselves with a mediocrity of success.

I think the discovery of supersymmetric partners for the known particles would revolutionize our understanding of the universe.

I am not solicitous to examine particularly everything here, which indeed could not be done in fifty years, because my desire is to make all possible discoveries, and return to your Highnesses, if it please our Lord, in April.

I spent more time on dark ships in danger zones than any other woman in the world.

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.

Land on Mars, a round-trip ticket – half a million dollars. It can be done.

The greatest progress is in the sciences that study the simplest systems. So take, say, physics – greatest progress there. But one of the reasons is that the physicists have an advantage that no other branch of sciences has. If something gets too complicated, they hand it to someone else.

My first popular book, ‚A Brief History of Time,‘ aroused a great deal of interest, but many found it difficult to understand.

I’ve been everywhere in the world, seen everything, had everything a man can have.

There is no hunting like the hunting of man, and those who have hunted armed men long enough and liked it, never care for anything else thereafter.

With the exception of gravitation and radioactivity, all of the phenomena known to physicists and chemists in 1911 have their ultimate explanation in the laws of quantum electrodynamics.

It now appears that the way the universe began can indeed be determined, using imaginary time.

One of the best ways to see tree flowers is to climb one of the tallest trees and to get into close, tingling touch with them, and then look broad.

Many a trip continues long after movement in time and space have ceased.

Adventures are to the adventurous.

When you go to the mountains, you see them and you admire them. In a sense, they give you a challenge, and you try to express that challenge by climbing them.