What you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise.

I think [contacting an alien civilization] would be a disaster. The extraterrestrials would probably be far in advance of us. The history of advanced races meeting more primitive people on this planet is not very happy, and they were the same species. I think we should keep our heads low.

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

Although I cannot move, and I have to speak through a computer, in my mind, I am free.

You can't regulate every lab in the world.

If you understand how the universe operates, you control it in a way.

Sometimes I wonder if I'm as famous for my wheelchair and disabilities as I am for my discoveries.