As for the flat Earth theory, to keep it brief, I would like to suggest that proponents of this nonsense get on a plane and fly to the edge of the Earth, take photos and videos, and finally show us all what this mysterious "edge of the world" looks like and what lies beyond it? :) For some reason, none of these eccentrics have agreed to such an experiment, even the one who conducted an experiment on board an airplane. Most likely, no one wants to conduct an experiment that would prove the opposite. :)
(Василь Симоненко. Люди – прекрасні)