What We Usually Consider As Impossible Are

Chances Are, The Aliens Will Not Want To Land On Our Backyard, Or Even The White House Lawn, With Their Flying Saucers. They May Have Tiny, Robotic Self-replicating Probes Which Can Reach Near Light Speed And Can Proliferate Around The Galaxy. So Instead Of The Enterprise And Huge Star Ships, The Aliens Might Actually Send Tiny Probes To Explore The Universe. One Might Land On Our Lawn And We Won't Even Know.

Already From Your Own Cells Scientists Can Grow Skin, Cartilage, Noses, Blood Vessels, Bladders And Windpipes. In The Future, Scientists Will Grow More Complex Organs, Like Livers And Kidneys. The Phrase 'organ Failure' Will Disappear.

Hover Boards, Unfortunately, Currently Violate The Laws Of Physics. Supermagnets Exist, But They Have To Be Cooled To Near Absolute Zero, And They Are Extremely Expensive. So Michael J. Fox's Hover Boards Are Not Possible Until We Invent Room Temperature Super Conductors.

Science Is About Principles. It's About Concepts. It's Not About Memorizing The Parts Of A Flower. It Helps To Know Some Of These Things, But If That's All You Do That's Not Science, Science Is About Principles And Concepts.

I'm A Physicist, And We Have Something Called Moore's Law, Which Says Computer Power Doubles Every 18 Months. So Every Christmas, We More Or Less Assume That Our Toys And Appliances Are More Or Less Twice As Powerful As The Previous Christmas.