Observations indicate that the universe is expanding at an ever increasing rate. It will expand forever, getting emptier and darker.

Time travel was once considered scientific heresy, and I used to avoid talking about it for fear of being labelled a 'crank.'

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

I want my books sold on airport bookstalls.

[On President Bush's plan to get to Mars in 10 years] Stupid. Robots would do a better job and be much cheaper because you don't have to bring them back.

In A Brief History Of Time I used the word "God" like Einstein did as a shorthand for the laws of physics. However, this is not what most people mean by God, so I have decided not to use the term. The laws of physics can explain the universe without the need for a God.

The initial configuration of the universe may have been chosen by God, or it may itself have been determined by the laws of science. In either case, it would seem that everything in the universe would then be determined by evolution according to the laws of science, so it is difficult to see how we can be masters of our fate.