Because Imaginary Time Behaves Like Another Direction

Think Of Our Dna. In The Last Million Years, Our Dna Hasn't Changed At All. It's Really Much The Same As It Was In The Jungle, A Million, Two Millions Years Ago. But In The Last 200 Years, Our Destructive Capacities Have Increased Many, Many Millions Of Times Over. Why Don't We See Intelligent Signals From Outer Space? Because In All Likelihood, Once The Civilization Reaches The Point Our Civilization Has Reached, It Destroys Itself.

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

One Big Contribution My Father [stephen Hawking] Has Made Is To Show That Having A Disability Does Not Bar You From Leading A Full And Eventful Life.

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

If Everything In The Universe Depends Upon Everything Else In A Fundamental Way, It Might Be Impossible To Get Close To A Full Solution By Investigating Parts Of The Problem In Isolation.