Air is a physical substance that has weight. It was Italian physicist Evangelista Torricelli that in 1640 made the discovery by measuring mercury and finding that air put pressure on the mercury. That was – in its purest - the very beginning of what we call today the aviation industry. And that was over 380 years ago. Other pioneers including Francesco Lana, Sir Isaac Newton, the Montgolfier brothers, Orville and Wilbur Wright, and many more made it possible for the industry we now enjoy to exist through many experiments, perseverance, dedication and a thirst for innovation and disruption attaining to the impossible when many believed so.