Science blogs bore me. When everyone is an expert, no one is an expert.

I’m not an historian but I’ll venture an opinion: Modern cosmology really began with Darwin and Wallace. Unlike anyone before them, they provided explanations of our existence that completely rejected supernatural agents… Darwin and Wallace set a standard not only for the life sciences but for cosmology as well.

You are a victim of your own neural architecture which doesn’t permit you to imagine anything outside of three dimensions. Even two dimensions. People know they can’t visualise four or five dimensions, but they think they can close their eyes and see two dimensions. But they can’t.

Physics is perceived as a lonesome, nerdy kind of enterprise that has very little to do with human feelings and the things that excite people day-to-day about each other. Yet physicists in their own working environment are very social creatures.

Science to me is sufficiently weird and interesting, and stranger than fiction.

Is the universe ‘elegant,’ as Brian Greene tells us? Not as far as I can tell, not the usual laws of particle physics, anyway. I think I might find the universal principles of String Theory most elegant – if I only knew what they were.

Whether or not evolution is compatible with faith, science and religion represent two extremely different worldviews, which, if they coexist at all, do so most uncomfortably.

Over the years, I began to understand that there were a lot of people out there reading physics in popular literature that they could not understand – not because it was too advanced, but because it wasn’t advanced enough.

We often say that the earth is a sphere, but to be precise, the term sphere refers only to the surface. The correct mathematical term for the solid earth is a ball.

I often feel a discomfort, a kind of embarrassment, when I explain elementary-particle physics to laypeople. It all seems so arbitrary – the ridiculous collection of fundamental particles, the lack of pattern to their masses.

I have always enjoyed explaining physics. In fact it’s more than just enjoyment: I need to explain physics.

I’m a great believer in our ability to come up with the ideas necessary to solve the big questions. I have less confidence that we’ll be able to find a consensus about which ones are right without experiment.

I did not come from an academic background. My father was a smart man, but he had a fifth-grade education. He and all his friends were plumbers. They were all born around 1905 in great poverty in New York City and had to go to work when they were 12 or 13 years old.

Space can vibrate, space can fluctuate, space can be quantum mechanical, but what the devil is it? And, you know, everybody has their own idea about what it is, but there’s no coherent final consensus on why there is space.

A lot of my research time is spent daydreaming – telling an imaginary admiring audience of laymen how to understand some difficult scientific idea.

Eventually, when the universe expands enough, all that will be left is the dark energy.

It seems hopelessly improbable that any particular rules accidentally led to the miracle of intelligent life. Nevertheless, this is exactly what most physicists have believed: intelligent life is a purely serendipitous consequence of physical principles that have nothing to do with our own existence.

Man – life in general – seems irrelevant to the workings of the universe: a mere smudge of water, grease, and carbon on a pinpoint planet circling a star of no special consequence.

I’m doing physics because I’m curious about how it works – full speed ahead, damn the torpedoes, don’t worry about whether somebody is going to be able to do an experiment next week, just figure it out.

I went to college because my father thought that I should learn engineering, because he wanted to go into the heating business with me. There, I realized I wanted to be a physicist. I had to tell him, which was a somewhat traumatic experience.

Why is there space rather than no space? Why is space three-dimensional? Why is space big? We have a lot of room to move around in. How come it’s not tiny? We have no consensus about these things. We’re still exploring them.

Einstein, in the special theory of relativity, proved that different observers, in different states of motion, see different realities.

I’m not going to argue with people about the existence of God. I have not the vaguest idea of whether the universe was created by an intelligence.

Unforeseen surprises are the rule in science, not the exception. Remember: Stuff happens.

I was going to engineering school but fell in love with physics.

I was from a poor Jewish family in the South Bronx. My father was a plumber, but when I was 16, he got sick and I had to take over. Being a plumber in the South Bronx wasn’t fun.

[Richard Feynman] truly believed that if you couldn’t explain something simply, you didn’t understand it.

There is so much to groak; So little to groak from.

The most important single thing about string theory is that it’s a highly mathematical theory, and the mathematics holds together in a very tight and consistent way. It contains in its basic structure both quantum mechanics and the theory of gravity. That’s big news.

I’m a great believer that scientists should spend as much time as possible explaining, and you do explain in the process of teaching.