The theory has to be interpreted that extra dimensions beyond the ordinary four dimensions the three spatial dimensions plus time are sufficiently small that they haven't been observed yet.

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

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

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

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 everything in my head, without pencil and paper.

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

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 likely to be tested.

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 consciousness.

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. Proposals about that have been all over the map.

One very important aspect of string theory is definitely testable. That was the prediction of supersymmetry, which emerged from string theory in the early '70s.

String theory is an attempt at a deeper description of nature by thinking of an elementary particle not as a little point but as a little loop of vibrating string.

You have the ability to drive your brain and the capability to nab the steering wheel back any time you feel yourself veering off the road you intended to take.

As usual, in every scheme that worsens the position of the poor, it is the poor who are invoked as beneficiaries.

Let us make our future now, and let us make our dreams tomorrow's reality.

My work is being destroyed almost as soon as it is printed. One day it is being read; the next day someone's wrapping fish in it.

You can take an object and simply put anything you want in that object, and I accessed that partly through Freudian ideas.

And Hillary Clinton is going to do nothing for the African- American worker, the Latino worker.

What follows I flee; what flees I ever pursue.

One of my biggest lessons in life is, we heal at the speed of our forgiveness.

You best go about your way and have a nice day

My favorite healthy foods are Jamaican chicken soup, Jamaican chicken stew peas, Jamaican brown stew chicken, plantains and banana chips.