I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in science.

Don't be disabled in spirit as well as physically.

I think computer viruses should count as life ... I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image.

Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it.

If I had to choose a superhero to be, I would pick Superman. He's everything that I'm not.

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.

In real time, the universe has a beginning and an end at singularities that form a boundary to space-time and at which the laws of science break down.