Nothing Cannot Exist Forever.

Chaos, When Left Alone, Tends To Multiply.

We Are Entering An Increasingly Dangerous Period Of Our History. But I'm An Optimist.

I Think My Dad [ Stephen Hawking] Would Have Been Pleased If I Had Turned Out A Scientist Because He Truly Believes That Is The Most Interesting Career Open To Anyone. But He Also Believes That You Have To Follow Your Own Path In Life And So He Certainly Wasn't Going To Push Me Toward Theoretical Physics When It Didn't Look Like I Was Going In That Direction Naturally.

A Model Is A Good Model If First It Interprets A Wide Range Of Observations In Terms Of A Simple And Elegant Model, And Second If The Model Makes Definite Predictions That Can Be Tested, And Possibly Falsified, By Observation.

But A Machine That Was Powerful Enough To Accelerate Particles To The Grand Unification Energy Would Have To Be As Big As The Solar System - And Would Be Unlikely To Be Funded In The Present Economic Climate.