Given that some people claim the curvature of the Earth is not accounted for in surveying, I thought it would be interesting to document various...
Had an idea about how to very clearly and very easily show that the horizon isn't at eye level: take some pictures of some eyes! You will need:...
[ATTACH] In a video titled "*** 4,519 MILES & NO CURVE! Globe Debunked Once And For All *** RESEARCH FLAT EARTH", Youtuber Paul On The Plane uses...
[ATTACH] Youtuber Darryle Marble, a believer in the "Flat Earth" theory, recently took a spirit level on a plane to attempt to demonstrate that...
During the course of my two hour talk with Joe Rogan on the Flat Earth theory, I made a few mistakes. Fact checkers have pointed out some of these...
South of the equator when you are looking south at the southern night sky you always see the same point in the sky: the south celestial pole....
[ATTACH] Mick was just on Joe Rogan and spoke heavily on Flat Earth. One thing he said, was that many flat earth researchers incorrectly report...
[ATTACH] There are several satellites that take photos of the full disk of the earth on a regular basis, but the most impressive are the three...
ground truth, n. 1. A fundamental truth. Also: the real or underlying facts; information that has been checked or facts that have been collected...
[ATTACH] https://www.metabunk.org/flat/ I wrote a flat vs. globe route simulator over the weekend. It shows the shortest route between two...
[ATTACH] Any position on the surface of the world can be represented by two numbers: latitude (the north or south angle from the equator) and...
[ATTACH] From past the orbit of Mars, the solar system looks a bit like the above. Earth is just a speck, not even visible here (at the end of...
This question originates from a YouTube video called "NASA Blue Marble 100% Debunked" by Flat Earth Asshole (pardon the language, but that is...
[ATTACH] A theodolite is a relatively simple instrument for measuring vertical and horizontal angles. It's commonly used for surveying, but you...
I also had a very clear view of Catalina island, significant parts of which were under the horizon. [ATTACH] I had to do a bit more than stand up...
When people want to practically illustrate the curvature of the Earth, they often give the example of a boat disappearing over the horizon. While...
[ATTACH] The following discussion has a error in that it was assumed the field of view was the same at long distances as it was at 8m. In fact...
The earths curve is approximately 8 inches per mile squared. With planes flying at 500mph, the earth would curve beneath them around 31.5 miles...
[ATTACH] The idea of a Flat Earth is firmly at the far end of the conspiracy spectrum. It's an extreme conspiracy theory because the belief...
A classic demonstration of the curvature of the Earth was performed by Alfred Russel Wallace in 1870:...
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