The Wright Brothers conquer it, but never knew what it was. Sir Isaac Newton saw it. But he didn't know what it was. When his apple got loose, the fruit did not fall. It flew, just like the first airplane. Relative to Earth's surface, the apple flew down. It is amazing to suddenly realize that everything is in a state of flight. Everything is flying! You, your cup of coffee, your car, smartphone, and your house are flying right now. And we do not...