God Abhors A Naked Singularity.

The Universe Is Governed By Science. But Science Tells Us That We Can't Solve The Equations, Directly In The Abstract.

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.

Computer Viruses Are Alive.

I Don't Think The Human Race Will Survive The Next Thousand Years, Unless We Spread Into Space. There Are Too Many Accidents That Can Befall Life On A Single Planet. But I'm An Optimist. We Will Reach Out To The Stars.

Time Travel Was Once Considered Scientific Heresy, And I Used To Avoid Talking About It For Fear Of Being Labelled A 'crank.'