Also known as: Flat Earth Clues
Mark Sargent is one of the most recognizable faces of the modern flat-Earth movement, especially through his "Flat Earth Clues" YouTube series from around 2015 onward. He often presents himself as a researcher who "woke up" via simulations and visual oddities rather than formal measurement. The claims below are paraphrased from his recurring talking points in videos, interviews, and debates, for context and mapping, not quoted as endorsement or settled fact.
This index maps 50 recurring arguments to pages where you can test the globe prediction directly.