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

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.

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.

I wouldn't have thought that a wrong theory should lead us to understand better the ordinary quantum field theories or to have new insights about the quantum states of black holes.

String theory is 21 st century physics that fell accidentally into the 20th century.

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

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.