I have sold more books on physics than Madonna has on sex.

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

I think the next [21st] century will be the century of complexity. We have already discovered the basic laws that govern matter and understand all the normal situations. We don't know how the laws fit together, and what happens under extreme conditions. But I expect we will find a complete unified theory sometime this century. The is no limit to the complexity that we can build using those basic laws.

A picture is worth a thousand words...and uses up a thousand times the memory.

One could imagine such technology outsmarting financial markets, out-inventing human researchers, out-manipulating human leaders, and developing weapons we cannot even understand.

We waste time, so you don't have to.

A lot of prizes have been awarded for showing the universe is not as simple as we might have thought.