## Weight and Air Density Experiment

Using a precise digital kitchen scale and a smartphone with a pressure sensor, we can easily measure the change in weight and atmospheric pressure in different locations.

Flat-Earthers claim that an object falls down because it is denser than the air surrounding it. However, simple measurements show that things weigh less at a higher altitude where the air is less dense, contrary to the expectation if their claim is true.

## Predicting Eclipses Does Not Require the Saros Cycle or NASA’s Involvement

Using the current computing power, predicting eclipses is usually done iteratively. We determine the position of the Sun and the Moon at a time and calculate their elongation to determine if an eclipse happens. This same procedure is then repeated many times, each for a different time.

Flat-Earthers insist that nobody can predict eclipses from the position of the Sun and the Moon. They incorrectly believe NASA used the ancient Saros cycle to predict eclipses by calculating the interval between eclipses. A tiny Python script can easily debunk it.

## Flat Earth Denominations and the Lack of Agreement Among Them

Flat-Earth communities around the globe are separated by country borders, language barriers, prominent religions, the leading figures, etc. As a result, they form several loosely-knitted but distinct denominations. Because flat-Earth is believed, not based on facts, each of the different factions invents and endorses different sets of “explanations” and talking points. All of them only agree on a single thing, that Earth is flat, but they cannot agree on practically everything else.

Many flat-Earthers would incorrectly dismiss our explanations as a strawman. In reality, we address flat-Earth misinformation from all denominations, and we might address ones that do not exist in their specific denomination. These are, however, still flat-Earth misinformation that people might fall for and worth debunking.

## Tools We Use

As this is turning into a frequently asked question, the following lists the various tools we use to create our illustrations.

## Dinosaur Earth: More Accurate Representation of the Shape of the Earth

For thousands of years, we have been fed the narration that the Earth is either a sphere or flat. Now it is time to come forward and spread the fact that the Earth is a dinosaur.

The Dinosaur Earth model better explains the results of observations compared to either the spherical or the flat Earth model. And therefore, it is a better representation of the real shape of the Earth and supersedes the other models.

## Special Coronavirus/COVID-19 Statement

Considering the following facts:

• Those who believe in flat-Earth-related hoaxes are also prone to believe —and therefore spread— COVID-19 related hoaxes and conspiracy theories.
• Those of us who like to observe and interact with flat-Earthers are likely to encounter many COVID-19 hoaxes and conspiracy theories.
• And unlike flat Earth, COVID-19 hoaxes and conspiracy theories might directly affect our lives and even the future of the human race.

We feel it is important not to let our responses to backfire and fails to achieve the ideal outcome, which is the prevention of the circulation of COVID-19 related hoaxes and conspiracy theories.

## Our recommendation:

• Avoid directly addressing the COVID-19 hoaxes and conspiracy theories yourselves, which potentially makes them more popular.
• Instead, report the hoaxes and conspiracy theories using the tools provided by the social media platform, or to an independent fact-checker in your country.

We wish everyone (including flat-Earthers) good health in these unfortunate times.

## Translating Our Contents to Your Language

Educating the general public against flat-Earth and other science-related misinformation is more effective by reaching out and using the native language of the intended audience. Currently, our contents are available in seven languages: English, Indonesian, Portuguese, Arabic, Spanish, Italian and Dutch.

We want to work together with people who are interested in translating our contents into more languages.

## Rebuttals to Eric Dubay’s “200 Proofs Earth is not a Spinning Ball”

Eric Dubay made the purported list of 200 “proofs” Earth is not a spinning ball. These are the list of his “proofs” and links to the rebuttals elsewhere on this website. Links open in a new tab.

This is a work in progress. New rebuttals are being added regularly.

## The Long Chains of Ad-Hoc Hypotheses to Defend the Flat-Earth Model

The flat-Earth model survives not because the Earth is flat, but because every time a problem is found, its proponents would quickly invent an ad-hoc hypothesis to explain the problem away. In turn, if they discover another problem in one of these ad-hoc hypotheses, they would be happy to invent another ad-hoc hypothesis to explain the problem away. And so on, and so forth.

These ad-hoc hypotheses are there to save their core belief —that the Earth is flat— from being falsified.

## Why Don’t We See Satellites in Photos Taken From The ISS?

“Why don’t we see satellites in photos taken from the ISS?” (or from space in general). That’s a recurring question within the flat-Earth community, usually asked without expecting an answer, assuming that an answer is impossible, and that it is a glaring oversight when the powers that be purposefully made the picture using CGI.

But no, the pictures are real. And satellites are not visible because they are too far spaced apart from each other.

## Welcome to FlatEarth.ws

Welcome to FlatEarth.ws! We operate an Indonesian Flat Earth debunking site BumiDatar.id since July 2017. Due to popular requests, we’ll be doing English version of our posts here. Stay tuned!