So if the earth is Flat, why does the sun set two minutes sooner at the bottom of the Burj Khalifa (the tallest building in the world), and two minutes later at the top? http://gizmodo.com/5917230/did-you-know-that-the-burj-khalifa-is-so-tall-that-you-can-watch-two-sunsets-on-the-same-day Doesn't this imply curvature? This is a compelling observation that seems at face value to call Flat Earth Theory into question. I'd like to explain how this phenomena actually works, given the fact that society always swallows "cuz curvature" as the magic explanation explaining everything involving the visible horizon. Basic observation of phenomena across nature support the idea that the earth is Flat. Sunsets observed from the tallest building in the world are no exception. In case you are new to the claims of Planar Theory let me briefly explain: [url=https://flatearthandthought.com/2017/01/17/question-how-do-daynight-cycles-and-seasons-work-on-a-flat-earth/]the sun is smaller and much closer to the surface of the Flat Earth, and orbits above its surface.[/url] Three dimensionally this picture captures the relation of the sun to the earth (though greatly exaggerated in terms of proportion). The sun "sets" because it recedes from view. Imagine a car driving away on a perfectly flat road. Eventually, you no longer see its head lights. This is essentially what happens on the Flat Earth as well. Also, due to Variable Luminosity, the sun does not emit light equally in all directions and acts more as a spot light. When one takes these factors into consideration, the time difference in sunsets makes sense on the Burj Khalifa: observers on the top floor are closer longitudinally to the sun. The sun's rays reach them a fraction sooner than observers at the bottom. If you measured both lines you would see that the line reaching the bottom is longer than the one reaching the top. Think of those lines as rays of light from the sun. With a building as tall as the Burj Khalifa, this difference in height produces the difference in sunset time.