03/29/2026
In the 2018 documentary Behind the Curve, a Flat Earther named Jeran Campanella set up an experiment to prove the Earth is flat by using a light and two boards with holes cut at the same height. The idea was that if the Earth were flat, the light would be visible through both holes even at a long distance. However, when the light was held at the initial height, it couldn't be seen. It only became visible when the person holding it raised the light high above their head, which accounted for the curvature of the Earth. Jeran famously reacted to the result by simply saying, "That's interesting," as his own test directly contradicted his beliefs.
Source: Behind the Curve (2018 documentary) / Netflix / National Geographic (2024)