flat earth

In @ericdubay's "200 proofs" list he claims that rivers such as the Nile, the Paraná, the Congo, the Paraguay, and the Mississippi "flow uphill". The rationale behind it seems to be that rivers which flow from north to south (in the northern hemisphere), or south to north (in the southern), and...

This thread documents the progress of planning, execution, and analysis of an Experiment conducted by Sandor Szekely (a believer in the "Flat Earth" theory) on Lake Balaton in Hungary. The goal of the experiment was to measure the curvature of the surface of a lake by shining a laser across it...

The above sequence of images is the international space station. I took them on Saturday, May 28th 2016, at 9:28PM in the Northern California town of Shingle Springs (near Sacamento). They are not very good, but you can still make out the general shape of the ISS, with the central body, and the...

This experiment supports the null-hypothesis (earth is not moving). The experiment is faulty, of course, but I suspect anything I might say about that would be hopelessly naïve. The most cogent comments to this video I could find: Eric Charters2 months ago The gyro appears to precess only...

So, this supposedly shows Three Lakeway Center, in Metairie, Louisiana, a 403-foot (123 m)-tall skyscraper from the other end of Lake Pontchartrain Causeway. Curvature should show a 116m drop for that distance, and the buildings around it are lower than 116m. (Google Street, from the...

Flat earthers will quote the height and range of a lighthouse and then claim the light should be hundreds of feet below the horizon at that range if the world were spherical. So therefore the world is flat. But they are assuming the listed range of a lighthouse is the maximum range it can be...

When researching Flat Earth Theory there is 1 claim that I am finding puzzlingly hard to debunk. If the earth is spinning around its own axis, and orbiting around the sun, at a regular speed then, why don't we have to change our clocks by a full 12 hours every 6 months to account for the fact...

Sometimes clouds appear to be behind the sun or the moon in photos and videos, like the example above (source). This confuses people, as the sun is 93 million miles away, so it's impossible for clouds to be behind it. Some people take this as evidence that reality is an illusion, or the Earth is...

My father was a member of the Flat Earth society. He knew the Earth was a globe, but liked the idea of questioning assumptions. Like many (if not most) flat earthers he was just playing devil's advocate - for intellectual amusement, and to make a point about accepting claims on face value. The...

To debunk the Flat Earth theory, you can just use Sydney to Santiago, Chile, Quantas flight 27, 7000 miles. 12 hour flight. This flight would be impossible on the Flat Earth model, requiring the plane to travel at twice the speed of sound. Santiago is the furthest south South American city...

A particular flat earth video calims this video of a solar eclipse taken from a space balloon is fake because we cannot se the moon covering the sun in the footage of this solar eclipse: Why dont we see the moon covering the sun in the in the video? Shouldnt we see it? Or is it because of...

I keep being presented with 'earth curvature experiment' videos recently, by flat/concave earth advocates. It seems to be their new favorite "evidence" that Earth is not spherical. Debunking this gets into math which I stink at, regarding refraction. I would like to be sure I have considered...