[on President Bush's Plan To Get To

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.

I Have Sold More Books On Physics Than Madonna Has On Sex.

Any Physical Theory Is Always Provisional, In The Sense That It Is Only A Hypothesis: You Can Never Prove It. No Matter How Many Times The Results Of Experiments Agree With Some Theory, You Can Never Be Sure That The Next Time The Result Will Not Contradict The Theory.

The Idea Of 10 Dimensions Might Sound Exciting, But They Would Cause Real Problems If You Forget Where You Parked Your Car.

There Is No Way That We Can Predict The Weather Six Months Ahead Beyond Giving The Seasonal Average.