https://www.theguardian.com/science/2019/jan/09/flat-earth-cruise-nautical-navigation
https://www.metabunk.org/threads/flat-earth-theory-debunked-by-short-flights-qf27-qf28-from-australia-to-south-america.6483/
https://wiki.tfes.org/Shifting_Constellations
https://brucesherwood.net/?p=420
livescience.com/63648-flat-earth-explanation-for-the-equinox.html
https://www.quora.com/Why-do-flat-earthers-believe-we-are-being-lied-to-about-the-Earth-being-round
https://edition.cnn.com/2019/11/16/us/flat-earth-conference-conspiracy-theories-scli-intl/index.html
https://www.forbes.com/sites/startswithabang/2017/11/24/five-impossible-facts-that-would-have-to-be-true-if-the-earth-were-flat/#65471d5c7c4f
https://wiki.tfes.org/Flat_Earth_-_Frequently_Asked_Questions
https://www.livescience.com/65053-flat-earther-cruise-antarctica-ice-wall.html
https://wiki.tfes.org/The_Ice_Wall
https://www.space.com/40473-flat-earthers-explain-pac-man-effect.html
https://www.vice.com/en_us/article/a3dnep/ten-questions-you-always-wanted-to-ask-a-flat-earth
https://creation.com/a-direct-test-of-the-flat-earth-model-flight-times