In the past, when people looked up into the sky and wondered how the airplanes they saw up there could fly, they would need to perform complex calculations and conduct extremely difficult experiments before they could find some clue as to “the interaction between air and objects” that allows an airplane to stay afloat high in the sky. Due to the sheer mass of an airplane, it would be incredibly costly and nearly impossible for the average person to carry out an experiment with a r ...more