Impossible Is Relative.

We Should Explore New Ways To Drive Down The Cost Of Space Travel. Instead Of Costly Booster Rockets, Maybe We Should Think Of Laser/microwave Driven Rockets, Or Space Elevators. Until Then, The Cost Of Space Exploration Will Limit Our Ability To Explore The Universe.

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.)

Although Humans Have Existed On This Planet For Perhaps 2 Million Years, The Rapid Climb To Modern Civilization Within The Last 200 Years Was Possible Due To The Fact That The Growth Of Scientific Knowledge Is Exponential; That Is, Its Rate Of Expansion Is Proportional To How Much Is Already Known. The More We Know, The Faster We Can Know More. For Example, We Have Amassed More Knowledge Since World War Ii Than All The Knowledge Amassed In Our 2-million-year Evolution On This Planet. In Fact, The Amount Of Knowledge That Our Scientists Gain Doubles Approximately Every 10 To 20 Years.

In Fact, All Of Us Have A Piece Of Chernobyl In Our Bodies Going Back To 1986.

Growing New Organs Of The Body As They Wear Out, Extending The Human Lifespan? What's Not To Like?