https://www.timeanddate.com/worldclock/sunearth.html?iso=20191221T0918Every December, when it is around noon in Tierra del Fuego, the sun will also be up in South Africa, and New Zealand. But directly between them is the North Pole, where it will be dark for months.
This is impossible on a Flat Earth.
Observe also that the sun's angular size is the same for everyone on Earth. And every hour, it moves 15° across the sky. This is exactly what we would expect if it was the same distance from everyone. But Flat Earth theory requires the sun to be far closer to some observers than others. The discrepancies are rationalized with "Bendy light" that behaves like no form of optics ever demonstrated anywhere.
