![I watched hundreds of flat-Earth videos to learn how conspiracy theories spread – and what it could mean for fighting disinformation I watched hundreds of flat-Earth videos to learn how conspiracy theories spread – and what it could mean for fighting disinformation](https://images.theconversation.com/files/469831/original/file-20220620-16-dhw8r8.jpg?ixlib=rb-1.1.0&rect=80%2C34%2C7588%2C3196&q=20&auto=format&w=320&fit=clip&dpr=2&usm=12&cs=strip)
I watched hundreds of flat-Earth videos to learn how conspiracy theories spread – and what it could mean for fighting disinformation
![I watched hundreds of flat-Earth videos to learn how conspiracy theories spread – and what it could mean for fighting disinformation I watched hundreds of flat-Earth videos to learn how conspiracy theories spread – and what it could mean for fighting disinformation](https://images.theconversation.com/files/469831/original/file-20220620-16-dhw8r8.jpg?ixlib=rb-1.1.0&rect=91%2C643%2C5185%2C2586&q=45&auto=format&w=1356&h=668&fit=crop)
I watched hundreds of flat-Earth videos to learn how conspiracy theories spread – and what it could mean for fighting disinformation
![A flat-Earther spends 18,000 euros to prove his theory and ends up demonstrating the opposite | Marca A flat-Earther spends 18,000 euros to prove his theory and ends up demonstrating the opposite | Marca](https://e00-marca.uecdn.es/assets/multimedia/imagenes/2023/04/17/16817439172607.jpg)