Originally Posted By: AndyinAL
As expected, no one has proven any curvature. And you do not have to be accelerating upwards for there to be differentials in density. Of course things with greater density are going to fall from things with less density, like air
I flew on Concorde before they retired it. You could see the curvature of the earth from Concorde, because it flew much higher than regular aircraft, at 60,000 feet.