A model is a good model if first it interprets a wide range of observations in terms of a simple and elegant model, and second if the model makes definite predictions that can be tested, and possibly falsified, by observation.

No one can resist the idea of a crippled genius.

For years, my early work with Roger Penrose seemed to be a disaster for science. It showed that the universe must have begun with a singularity, if Einstein's general theory of relativity is correct. That appeared to indicate that science could not predict how the universe would begin.

While there's life, there is hope.

Do you ever wonder how much deeper the ocean would be without sponges?

Save water. Shower with your girlfriend.

God not only plays dice, he throws them in the corner where you can't see them.