Energy Is The Ultimate Convertable Currency.

In Any Finite Region Of Space, Matter Can Only Arrange Itself In A Finite Number Of Configurations, Just As A Deck Of Cards Can Be Arranged In Only Finitely Many Different Orders. If You Shuffle The Deck Infinitely Many Times, The Card Orderings Must Necessarily Repeat.

Physics Grapples With The Largest Questions The Universe Presents. Where Did The Totality Of Reality Come From? Did Time Have A Beginning?

I Have Long Thought That Anyone Who Does Not Regularly - Or Ever - Gaze Up And See The Wonder And Glory Of A Dark Night Sky Filled With Countless Stars Loses A Sense Of Their Fundamental Connectedness To The Universe.

General Relativity Is In The Old Newtonian Framework Where You Predict What Will Happen, Not The Probability Of What Will Happen. And Putting Together The Probabilities Of Quantum Mechanics With The Certainty Of General Relativity, That's Been The Big Challenge And That's Why We Have Been Excited About String Theory, As It's One Of The Only Approaches That Can Put It Together.

When You Drive Your Car, E = Mc2 Is At Work. As The Engine Burns Gasoline To Produce Energy In The Form Of Motion, It Does So By Converting Some Of The Gasoline's Mass Into Energy, In Accord With Einstein's Formula.