evidence: The Earth is not flat, and that is a fact roundly agreed upon by scientists. But a video on Facebook claims to show otherwise. [...] So, what does this video show? Flat-Earth theorists often use selected images from high-altitude videos to show a flat horizon. But even at lower altitudes than claimed in the video, Earth’s curvature is visible. For example, passengers in the retired supersonic Concorde plane, which could travel up to 60,000 feet, could see the Earth’s curvature. The curvature is sometimes visible at 35,000 feet, but that requires views devoid of clouds and a wide field of view, which most passenger airplane windows don’t have. [...] We rate the claim that this footage shows the Earth is flat Pants on Fire!