That's, of course, the beautiful thing about science - that it's all about things we don't understand, not just the things we do understand.

For a physicist mathematics is not just a tool by means of which phenomena can be calculated, it is the main source of concepts and principles by means of which new theories can be created.

I see a bright future for the biotechnology industry when it follows the path of the computer industry, the path that von Neumann failed to foresee, becoming small and domesticated rather than big and centralized.

CO2 is so beneficial...it would be crazy to try to reduce it

The world is just - it's wonderful when you look at all the detail. It's just amazing.

Computer models of the climate....[are] a very dubious business if you don't have good inputs.

It is characteristic of all deep human problems that they are not to be approached without some humor and some bewilderment.