Uploaded November 2018 | Updated September 2026, 5 hours ago

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The flat earth model says that air should have a uniform pressure filling the entire domed earth.
The globe earth model says that air, due to gravity has a pressure gradient getting thinner with altitude.
I did my own test driving up a mountain with an air pressure app on a 5th generation iPad.

Here's the link to Wolfie6020's original air pressure demonstration
youtu.be/s0qO1Cw-Oxg