The Best Theory Comes From String Theory,

Physicists Often Quote From T. H. White's Epic Novel The Once And Future King, Where A Society Of Ants Declares, "everything Not Forbidden Is Compulsory." In Other Words, If There Isn't A Basic Principle Of Physics Forbidding Time Travel, Then Time Travel Is Necessarily A Physical Possibility. (the Reason For This Is The Uncertainty Principle. Unless Something Is Forbidden, Quantum Effects And Fluctuations Will Eventually Make It Possible If We Wait Long Enough. Thus, Unless There Is A Law Forbidding It, It Will Eventually Occur.)

We Are Slowly Isolating The Genes Involved With The Aging Process. We Do Not Have The Fountain Of Youth, But I Think, In The Coming Decades, We Will Unravel The Aging Process At The Genetic Level.

You Can Mass-produce Hardware; You Cannot Mass-produce Software - You Cannot Mass-produce The Human Mind.

The Human Brain Has 100 Billion Neurons, Each Neuron Connected To 10 Thousand Other Neurons. Sitting On Your Shoulders Is The Most Complicated Object In The Known Universe.

Language And Emotions Are Too Easily Misread. For Example, Laughing Can Mean Many Things: Laughing With You Or At You. Does That Laugh Reflect Joy, Anger, Or That S/he's About To Fire You? Too Many Jobs Require Complex Feelings, Pattern Recognition, Common Sense, And The Human Touch.