On chaos
“Disorder increases with time because we measure time in the direction in which disorder increases. You can’t have a safer bet than that!”

— A Brief History of Time, 1988

On dimensions
“Evolution has ensured that our brains just aren’t equipped to visualise 11 dimensions directly. However, from a purely mathematical point of view it’s just as easy to think in 11 dimensions, as it is to think in three or four.”

— As quoted in the Guardian, 2005

On life on Earth
“The life we have on Earth must have spontaneously generated itself. It must therefore be possible for life to generate spontaneously elsewhere in the universe.”

— From an appearance on Alien Planet, on the Discover Channel, 2005

On UFOs
“I am discounting reports of UFOs. Why would they appear only to cranks and weirdos?”

On God
“We are each free to believe what we want and it is my view that the simplest explanation is there is no God. No one created the universe and no one directs our fate. This leads me to a profound realization. There is probably no heaven, and no afterlife either. We have this one life to appreciate the grand design of the universe, and for that, I am extremely grateful.”