1/r^2 has a nasty singularity at r=0, but it did not bother Newton-the Moon is far enough..

There was a long history of speculation that in quantum gravity, unlike Einstein's classical theory, it might be possible for the topology of spaceti….

Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle. String theory do….

If I take the theory as we have it now, literally, I would conclude that extra dimensions really exist. They're part of nature. We don't really know ….

One very important aspect of string theory is definitely testable. That was the prediction of supersymmetry, which emerged from string theory in the ….

It's indeed surprising that replacing the elementary particle with a string leads to such a big change in things. I'm tempted to say that it has to d….

In Einstein's general relativity the structure of space can change but not its topology. Topology is the property of something that doesn't change wh….

I have a tendency, more than most other physicists, to try to figure out everything all at once, before I publish. And even to try to figure out ever….

As far as extra dimensions are concerned, very tiny extra dimensions wouldn't be perceived in everyday life, just as atoms aren't: we see many atoms ….

Even before string theory, especially as physics developed in the 20th century, it turned out that the equations that really work in describing natur….

So when you ask me how string theory might be tested, I can tell you what's likely to happen at accelerators or some parts of the theory that are lik….

You enter a completely new world where things aren't at all what you're used to..

Superstring theories provide a framework in which the force of gravity may be united with the other three forces in nature: the weak, electromagnetic….

As for the forces, electromagnetism and gravity we experience in everyday life. But the weak and strong forces are beyond our ordinary experience. So….

I have a much easier time imagining how we would understand the big bang, even though we can't do it yet, than I can imagine understanding consciousn….

As of now, string theorists have no explanation of why there are three large dimensions as well as time, and the other dimensions are microscopic. Pr….

We know a lot of things, but what we don't know is a lot more..

I just think too many nice things have happened in string theory for it to be all wrong. Humans do not understand it very well, but I just don't beli….

One of the basic things about a string is that it can vibrate in many different shapes or forms, which gives music its beauty..

There is a difference between knowing what is true and knowing why it is true.

Im actually, for the most part, a complete agnostic politically..