There's The Caveman In Us. The Caveman

What Would Happen If History Could Be Rewritten As Casually As Erasing A Blackboard? Our Past Would Be Like The Shifting Sands At The Seashore, Constantly Blown This Way Or That By The Slightest Breeze. History Would Be Constantly Changing Every Time Someone Spun The Dial Of A Time Machine And Blundered His Or Her Way Into The Past. History, As We Know It, Would Be Impossible. It Would Cease To Exist.

The River Of Time May Fork Into Rivers, In Which Case You Have A Parallel Reality And So Then You Can Become A Time Traveler And Not Have To Worry About Causing A Time Paradox.

String Theory Is Based On The Simple Idea That All The Four Forces Of The Universe: Gravity, The Electromagnetic Force And The Two Nuclear Forces, Can Be Viewed, As Music.

Once Again, My Colleague Stephen Hawking Has Upset The Apple Cart. The Event Horizon Surrounding A Black Hole Was Once Though To Be An Imaginary Sphere. But Recent Theories Indicate That It May Actually Be Physical, Maybe Even A Sphere Of Fire. But I Don't Trust Any Of These Calculations Until We Have A Full-blown String Theory Calculation, Since Einstein's Theory By Itself Is Incomplete.

Physicists Are Made Of Atoms. A Physicist Is An Attempt By An Atom To Understand Itself.