As of 2020, the Singapore–New York flight route is the world’s longest flight route, while the Melbourne–Santiago route is the most southernmost route. The real-world durations of these routes are only consistent if Earth is a sphere.
On the flat-Earth model, the Melbourne–Santiago flight route should be a longer flight than the Singapore–New York route. These routes’ real-world durations disprove the flat-Earth model.
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Interstate 80 traverses the Bonneville Salt Flat, Utah, in a practically straight segment. From the hilly terrain to the west of the highway, we can observe the highway’s curve following Earth’s curvature using a long-zoom camera.
Flat-Earthers incorrectly claim that salt flats are perfectly flat and use them to “prove” a flat Earth. In reality, salt flats form a curve following Earth’s curvature, like the ocean’s surface.
High-altitude nuclear explosions (HANE) are the results of atomic weapons testing, conducted by the United States and the Soviet Union between 1958 and 1963. In these tests, nuclear warheads were launched and deliberately detonated at a high altitude, between 23 km and 540 km.
Flat-Earthers claim that HANEs were produced by attempts to penetrate the mythical dome enclosing the supposed flat Earth using nuclear weapons. They are wrong. The warheads were deliberately detonated at a high altitude, and the mythical dome does not exist in reality, only in their imaginations.
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